initial Olimex linux tree from Daniel, originally Feb 3, 2016

18 files changed, 4528 insertions, 0 deletions

diff --git a/linux/drivers/mailbox/.built-in.o.cmd b/linux/drivers/mailbox/.built-in.o.cmd
new file mode 100644
index 00000000..641677e5
--- /dev/null
+++ b/linux/drivers/mailbox/.built-in.o.cmd
@@ -0,0 +1 @@
+cmd_drivers/mailbox/built-in.o :=  arm-linux-gnueabihf-ld -EL    -r -o drivers/mailbox/built-in.o drivers/mailbox/mailbox.o drivers/mailbox/omap-mailbox.o 
diff --git a/linux/drivers/mailbox/.mailbox.o.cmd b/linux/drivers/mailbox/.mailbox.o.cmd
new file mode 100644
index 00000000..bd5eb8fb
--- /dev/null
+++ b/linux/drivers/mailbox/.mailbox.o.cmd
@@ -0,0 +1,501 @@
+cmd_drivers/mailbox/mailbox.o := arm-linux-gnueabihf-gcc -Wp,-MD,drivers/mailbox/.mailbox.o.d  -nostdinc -isystem /usr/lib/gcc-cross/arm-linux-gnueabihf/5/include -I./arch/arm/include -Iarch/arm/include/generated/uapi -Iarch/arm/include/generated  -Iinclude -I./arch/arm/include/uapi -Iarch/arm/include/generated/uapi -I./include/uapi -Iinclude/generated/uapi -include ./include/linux/kconfig.h -D__KERNEL__ -mlittle-endian -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs -fno-strict-aliasing -fno-common -Werror-implicit-function-declaration -Wno-format-security -std=gnu89 -fno-dwarf2-cfi-asm -fno-ipa-sra -mabi=aapcs-linux -mno-thumb-interwork -mfpu=vfp -funwind-tables -mthumb -Wa,-mimplicit-it=always -Wa,-mno-warn-deprecated -D__LINUX_ARM_ARCH__=7 -march=armv7-a -msoft-float -Uarm -fno-delete-null-pointer-checks -O2 --param=allow-store-data-races=0 -Wframe-larger-than=1024 -fstack-protector -Wno-unused-but-set-variable -fomit-frame-pointer -fno-var-tracking-assignments -Wdeclaration-after-statement -Wno-pointer-sign -fno-strict-overflow -fconserve-stack -Werror=implicit-int -Werror=strict-prototypes -Werror=date-time -DCC_HAVE_ASM_GOTO    -D"KBUILD_STR(s)=\#s" -D"KBUILD_BASENAME=KBUILD_STR(mailbox)"  -D"KBUILD_MODNAME=KBUILD_STR(mailbox)" -c -o drivers/mailbox/.tmp_mailbox.o drivers/mailbox/mailbox.c
+
+source_drivers/mailbox/mailbox.o := drivers/mailbox/mailbox.c
+
+deps_drivers/mailbox/mailbox.o := \
+  include/linux/interrupt.h \
+    $(wildcard include/config/lockdep.h) \
+    $(wildcard include/config/smp.h) \
+    $(wildcard include/config/irq/forced/threading.h) \
+    $(wildcard include/config/preempt/rt/base.h) \
+    $(wildcard include/config/preempt/rt/full.h) \
+    $(wildcard include/config/generic/irq/probe.h) \
+    $(wildcard include/config/proc/fs.h) \
+  include/linux/kernel.h \
+    $(wildcard include/config/lbdaf.h) \
+    $(wildcard include/config/preempt/voluntary.h) \
+    $(wildcard include/config/debug/atomic/sleep.h) \
+    $(wildcard include/config/mmu.h) \
+    $(wildcard include/config/prove/locking.h) \
+    $(wildcard include/config/panic/timeout.h) \
+    $(wildcard include/config/ring/buffer.h) \
+    $(wildcard include/config/tracing.h) \
+    $(wildcard include/config/ftrace/mcount/record.h) \
+  /usr/lib/gcc-cross/arm-linux-gnueabihf/5/include/stdarg.h \
+  include/linux/linkage.h \
+  include/linux/compiler.h \
+    $(wildcard include/config/sparse/rcu/pointer.h) \
+    $(wildcard include/config/trace/branch/profiling.h) \
+    $(wildcard include/config/profile/all/branches.h) \
+    $(wildcard include/config/enable/must/check.h) \
+    $(wildcard include/config/enable/warn/deprecated.h) \
+    $(wildcard include/config/kprobes.h) \
+  include/linux/compiler-gcc.h \
+    $(wildcard include/config/arch/supports/optimized/inlining.h) \
+    $(wildcard include/config/optimize/inlining.h) \
+  include/linux/compiler-gcc5.h \
+    $(wildcard include/config/arch/use/builtin/bswap.h) \
+  include/uapi/linux/types.h \
+  arch/arm/include/asm/types.h \
+  include/asm-generic/int-ll64.h \
+  include/uapi/asm-generic/int-ll64.h \
+  arch/arm/include/generated/asm/bitsperlong.h \
+  include/asm-generic/bitsperlong.h \
+    $(wildcard include/config/64bit.h) \
+  include/uapi/asm-generic/bitsperlong.h \
+  include/uapi/linux/posix_types.h \
+  include/linux/stddef.h \
+  include/uapi/linux/stddef.h \
+  arch/arm/include/uapi/asm/posix_types.h \
+  include/uapi/asm-generic/posix_types.h \
+  include/linux/stringify.h \
+  include/linux/export.h \
+    $(wildcard include/config/have/underscore/symbol/prefix.h) \
+    $(wildcard include/config/modules.h) \
+    $(wildcard include/config/modversions.h) \
+    $(wildcard include/config/unused/symbols.h) \
+  arch/arm/include/asm/linkage.h \
+  include/linux/types.h \
+    $(wildcard include/config/uid16.h) \
+    $(wildcard include/config/arch/dma/addr/t/64bit.h) \
+    $(wildcard include/config/phys/addr/t/64bit.h) \
+  include/linux/bitops.h \
+  arch/arm/include/asm/bitops.h \
+  include/linux/irqflags.h \
+    $(wildcard include/config/trace/irqflags.h) \
+    $(wildcard include/config/irqsoff/tracer.h) \
+    $(wildcard include/config/preempt/tracer.h) \
+    $(wildcard include/config/trace/irqflags/support.h) \
+  include/linux/typecheck.h \
+  arch/arm/include/asm/irqflags.h \
+    $(wildcard include/config/cpu/v7m.h) \
+  arch/arm/include/asm/ptrace.h \
+    $(wildcard include/config/arm/thumb.h) \
+    $(wildcard include/config/thumb2/kernel.h) \
+  arch/arm/include/uapi/asm/ptrace.h \
+    $(wildcard include/config/cpu/endian/be8.h) \
+  arch/arm/include/asm/hwcap.h \
+  arch/arm/include/uapi/asm/hwcap.h \
+  arch/arm/include/asm/barrier.h \
+    $(wildcard include/config/cpu/32v6k.h) \
+    $(wildcard include/config/cpu/xsc3.h) \
+    $(wildcard include/config/cpu/fa526.h) \
+    $(wildcard include/config/arm/heavy/mb.h) \
+    $(wildcard include/config/arch/has/barriers.h) \
+    $(wildcard include/config/arm/dma/mem/bufferable.h) \
+  include/asm-generic/bitops/non-atomic.h \
+  include/asm-generic/bitops/fls64.h \
+  include/asm-generic/bitops/sched.h \
+  include/asm-generic/bitops/hweight.h \
+  include/asm-generic/bitops/arch_hweight.h \
+  include/asm-generic/bitops/const_hweight.h \
+  include/asm-generic/bitops/lock.h \
+  include/asm-generic/bitops/le.h \
+  arch/arm/include/uapi/asm/byteorder.h \
+  include/linux/byteorder/little_endian.h \
+  include/uapi/linux/byteorder/little_endian.h \
+  include/linux/swab.h \
+  include/uapi/linux/swab.h \
+  arch/arm/include/asm/swab.h \
+  arch/arm/include/uapi/asm/swab.h \
+  include/linux/byteorder/generic.h \
+  include/asm-generic/bitops/ext2-atomic-setbit.h \
+  include/linux/log2.h \
+    $(wildcard include/config/arch/has/ilog2/u32.h) \
+    $(wildcard include/config/arch/has/ilog2/u64.h) \
+  include/linux/printk.h \
+    $(wildcard include/config/message/loglevel/default.h) \
+    $(wildcard include/config/early/printk.h) \
+    $(wildcard include/config/printk.h) \
+    $(wildcard include/config/dynamic/debug.h) \
+  include/linux/init.h \
+    $(wildcard include/config/broken/rodata.h) \
+    $(wildcard include/config/lto.h) \
+  include/linux/kern_levels.h \
+  include/linux/cache.h \
+    $(wildcard include/config/arch/has/cache/line/size.h) \
+  include/uapi/linux/kernel.h \
+  include/uapi/linux/sysinfo.h \
+  arch/arm/include/asm/cache.h \
+    $(wildcard include/config/arm/l1/cache/shift.h) \
+    $(wildcard include/config/aeabi.h) \
+  include/linux/dynamic_debug.h \
+  arch/arm/include/asm/div64.h \
+  arch/arm/include/asm/compiler.h \
+  arch/arm/include/asm/bug.h \
+    $(wildcard include/config/bug.h) \
+    $(wildcard include/config/debug/bugverbose.h) \
+    $(wildcard include/config/arm/lpae.h) \
+  arch/arm/include/asm/opcodes.h \
+    $(wildcard include/config/cpu/endian/be32.h) \
+  include/asm-generic/bug.h \
+    $(wildcard include/config/generic/bug.h) \
+    $(wildcard include/config/generic/bug/relative/pointers.h) \
+  include/linux/preempt.h \
+    $(wildcard include/config/debug/preempt.h) \
+    $(wildcard include/config/preempt/lazy.h) \
+    $(wildcard include/config/preempt/count.h) \
+    $(wildcard include/config/preempt.h) \
+    $(wildcard include/config/context/tracking.h) \
+    $(wildcard include/config/preempt/notifiers.h) \
+  include/linux/list.h \
+    $(wildcard include/config/debug/list.h) \
+  include/linux/poison.h \
+    $(wildcard include/config/illegal/pointer/value.h) \
+  include/uapi/linux/const.h \
+  arch/arm/include/generated/asm/preempt.h \
+  include/asm-generic/preempt.h \
+  include/linux/thread_info.h \
+    $(wildcard include/config/compat.h) \
+    $(wildcard include/config/debug/stack/usage.h) \
+  include/linux/bug.h \
+  arch/arm/include/asm/thread_info.h \
+    $(wildcard include/config/crunch.h) \
+    $(wildcard include/config/arm/thumbee.h) \
+  arch/arm/include/asm/fpstate.h \
+    $(wildcard include/config/vfpv3.h) \
+    $(wildcard include/config/iwmmxt.h) \
+  arch/arm/include/asm/page.h \
+    $(wildcard include/config/cpu/copy/v4wt.h) \
+    $(wildcard include/config/cpu/copy/v4wb.h) \
+    $(wildcard include/config/cpu/copy/feroceon.h) \
+    $(wildcard include/config/cpu/copy/fa.h) \
+    $(wildcard include/config/cpu/sa1100.h) \
+    $(wildcard include/config/cpu/xscale.h) \
+    $(wildcard include/config/cpu/copy/v6.h) \
+    $(wildcard include/config/kuser/helpers.h) \
+    $(wildcard include/config/have/arch/pfn/valid.h) \
+  arch/arm/include/asm/glue.h \
+  arch/arm/include/asm/pgtable-2level-types.h \
+  arch/arm/include/asm/memory.h \
+    $(wildcard include/config/need/mach/memory/h.h) \
+    $(wildcard include/config/page/offset.h) \
+    $(wildcard include/config/highmem.h) \
+    $(wildcard include/config/dram/base.h) \
+    $(wildcard include/config/dram/size.h) \
+    $(wildcard include/config/have/tcm.h) \
+    $(wildcard include/config/arm/patch/phys/virt.h) \
+    $(wildcard include/config/phys/offset.h) \
+    $(wildcard include/config/virt/to/bus.h) \
+  include/linux/sizes.h \
+  include/asm-generic/memory_model.h \
+    $(wildcard include/config/flatmem.h) \
+    $(wildcard include/config/discontigmem.h) \
+    $(wildcard include/config/sparsemem/vmemmap.h) \
+    $(wildcard include/config/sparsemem.h) \
+  include/asm-generic/getorder.h \
+  arch/arm/include/asm/domain.h \
+    $(wildcard include/config/io/36.h) \
+    $(wildcard include/config/cpu/use/domains.h) \
+  include/linux/cpumask.h \
+    $(wildcard include/config/cpumask/offstack.h) \
+    $(wildcard include/config/hotplug/cpu.h) \
+    $(wildcard include/config/debug/per/cpu/maps.h) \
+  include/linux/threads.h \
+    $(wildcard include/config/nr/cpus.h) \
+    $(wildcard include/config/base/small.h) \
+  include/linux/bitmap.h \
+  include/linux/string.h \
+    $(wildcard include/config/binary/printf.h) \
+  include/uapi/linux/string.h \
+  arch/arm/include/asm/string.h \
+  include/linux/irqreturn.h \
+  include/linux/irqnr.h \
+  include/uapi/linux/irqnr.h \
+  include/linux/hardirq.h \
+    $(wildcard include/config/tiny/rcu.h) \
+  include/linux/preempt_mask.h \
+  include/linux/lockdep.h \
+    $(wildcard include/config/lock/stat.h) \
+  include/linux/ftrace_irq.h \
+    $(wildcard include/config/ftrace/nmi/enter.h) \
+  include/linux/vtime.h \
+    $(wildcard include/config/virt/cpu/accounting/native.h) \
+    $(wildcard include/config/virt/cpu/accounting/gen.h) \
+    $(wildcard include/config/virt/cpu/accounting.h) \
+    $(wildcard include/config/irq/time/accounting.h) \
+  include/linux/context_tracking_state.h \
+  include/linux/percpu.h \
+    $(wildcard include/config/need/per/cpu/embed/first/chunk.h) \
+    $(wildcard include/config/need/per/cpu/page/first/chunk.h) \
+    $(wildcard include/config/have/setup/per/cpu/area.h) \
+  include/linux/mmdebug.h \
+    $(wildcard include/config/debug/vm.h) \
+    $(wildcard include/config/debug/virtual.h) \
+  include/linux/smp.h \
+    $(wildcard include/config/up/late/init.h) \
+  include/linux/errno.h \
+  include/uapi/linux/errno.h \
+  arch/arm/include/generated/asm/errno.h \
+  include/uapi/asm-generic/errno.h \
+  include/uapi/asm-generic/errno-base.h \
+  include/linux/llist.h \
+    $(wildcard include/config/arch/have/nmi/safe/cmpxchg.h) \
+  arch/arm/include/asm/cmpxchg.h \
+    $(wildcard include/config/cpu/sa110.h) \
+    $(wildcard include/config/cpu/v6.h) \
+  include/linux/prefetch.h \
+  arch/arm/include/asm/processor.h \
+    $(wildcard include/config/have/hw/breakpoint.h) \
+    $(wildcard include/config/arm/errata/754327.h) \
+  arch/arm/include/asm/hw_breakpoint.h \
+  arch/arm/include/asm/unified.h \
+    $(wildcard include/config/arm/asm/unified.h) \
+  include/asm-generic/cmpxchg-local.h \
+  include/linux/pfn.h \
+  arch/arm/include/asm/percpu.h \
+  include/asm-generic/percpu.h \
+  include/linux/percpu-defs.h \
+    $(wildcard include/config/debug/force/weak/per/cpu.h) \
+  include/linux/static_key.h \
+  include/linux/jump_label.h \
+    $(wildcard include/config/jump/label.h) \
+  include/linux/atomic.h \
+    $(wildcard include/config/arch/has/atomic/or.h) \
+    $(wildcard include/config/generic/atomic64.h) \
+  arch/arm/include/asm/atomic.h \
+  include/asm-generic/atomic-long.h \
+  arch/arm/include/asm/hardirq.h \
+  arch/arm/include/asm/irq.h \
+    $(wildcard include/config/sparse/irq.h) \
+    $(wildcard include/config/multi/irq/handler.h) \
+  include/linux/irq_cpustat.h \
+  include/linux/hrtimer.h \
+    $(wildcard include/config/missed/timer/offsets/hist.h) \
+    $(wildcard include/config/timer/stats.h) \
+    $(wildcard include/config/high/res/timers.h) \
+    $(wildcard include/config/timerfd.h) \
+    $(wildcard include/config/debug/objects/timers.h) \
+  include/linux/rbtree.h \
+  include/linux/ktime.h \
+  include/linux/time.h \
+    $(wildcard include/config/arch/uses/gettimeoffset.h) \
+  include/linux/seqlock.h \
+    $(wildcard include/config/debug/lock/alloc.h) \
+  include/linux/spinlock.h \
+    $(wildcard include/config/debug/spinlock.h) \
+    $(wildcard include/config/generic/lockbreak.h) \
+  include/linux/bottom_half.h \
+  include/linux/spinlock_types.h \
+  include/linux/spinlock_types_raw.h \
+  include/linux/spinlock_types_up.h \
+  include/linux/rtmutex.h \
+    $(wildcard include/config/debug/mutexes.h) \
+    $(wildcard include/config/debug/rt/mutexes.h) \
+  include/linux/spinlock_types_rt.h \
+  include/linux/rwlock_types_rt.h \
+  include/linux/spinlock_up.h \
+  include/linux/rwlock_rt.h \
+  include/linux/spinlock_api_up.h \
+  include/linux/spinlock_rt.h \
+  include/linux/math64.h \
+    $(wildcard include/config/arch/supports/int128.h) \
+  include/linux/time64.h \
+  include/uapi/linux/time.h \
+  include/linux/jiffies.h \
+  include/linux/timex.h \
+  include/uapi/linux/timex.h \
+  include/uapi/linux/param.h \
+  arch/arm/include/generated/asm/param.h \
+  include/asm-generic/param.h \
+    $(wildcard include/config/hz.h) \
+  include/uapi/asm-generic/param.h \
+  arch/arm/include/asm/timex.h \
+  include/linux/timekeeping.h \
+  include/linux/wait.h \
+  arch/arm/include/generated/asm/current.h \
+  include/asm-generic/current.h \
+  include/uapi/linux/wait.h \
+  include/linux/timer.h \
+  include/linux/debugobjects.h \
+    $(wildcard include/config/debug/objects.h) \
+    $(wildcard include/config/debug/objects/free.h) \
+  include/linux/timerqueue.h \
+  include/linux/kref.h \
+  include/linux/mutex.h \
+    $(wildcard include/config/mutex/spin/on/owner.h) \
+  include/linux/osq_lock.h \
+  include/linux/mutex_rt.h \
+  include/linux/workqueue.h \
+    $(wildcard include/config/debug/objects/work.h) \
+    $(wildcard include/config/freezer.h) \
+    $(wildcard include/config/sysfs.h) \
+  include/linux/delay.h \
+  arch/arm/include/asm/delay.h \
+  include/linux/slab.h \
+    $(wildcard include/config/debug/slab.h) \
+    $(wildcard include/config/kmemcheck.h) \
+    $(wildcard include/config/failslab.h) \
+    $(wildcard include/config/slab.h) \
+    $(wildcard include/config/slub.h) \
+    $(wildcard include/config/slob.h) \
+    $(wildcard include/config/zone/dma.h) \
+    $(wildcard include/config/numa.h) \
+  include/linux/gfp.h \
+    $(wildcard include/config/zone/dma32.h) \
+    $(wildcard include/config/pm/sleep.h) \
+    $(wildcard include/config/cma.h) \
+  include/linux/mmzone.h \
+    $(wildcard include/config/force/max/zoneorder.h) \
+    $(wildcard include/config/memory/isolation.h) \
+    $(wildcard include/config/memcg.h) \
+    $(wildcard include/config/memory/hotplug.h) \
+    $(wildcard include/config/compaction.h) \
+    $(wildcard include/config/have/memblock/node/map.h) \
+    $(wildcard include/config/flat/node/mem/map.h) \
+    $(wildcard include/config/page/extension.h) \
+    $(wildcard include/config/no/bootmem.h) \
+    $(wildcard include/config/numa/balancing.h) \
+    $(wildcard include/config/have/memory/present.h) \
+    $(wildcard include/config/have/memoryless/nodes.h) \
+    $(wildcard include/config/need/node/memmap/size.h) \
+    $(wildcard include/config/need/multiple/nodes.h) \
+    $(wildcard include/config/have/arch/early/pfn/to/nid.h) \
+    $(wildcard include/config/sparsemem/extreme.h) \
+    $(wildcard include/config/nodes/span/other/nodes.h) \
+    $(wildcard include/config/holes/in/zone.h) \
+    $(wildcard include/config/arch/has/holes/memorymodel.h) \
+  include/linux/numa.h \
+    $(wildcard include/config/nodes/shift.h) \
+  include/linux/nodemask.h \
+    $(wildcard include/config/movable/node.h) \
+  include/linux/pageblock-flags.h \
+    $(wildcard include/config/hugetlb/page.h) \
+    $(wildcard include/config/hugetlb/page/size/variable.h) \
+  include/linux/page-flags-layout.h \
+  include/generated/bounds.h \
+  include/linux/memory_hotplug.h \
+    $(wildcard include/config/memory/hotremove.h) \
+    $(wildcard include/config/have/arch/nodedata/extension.h) \
+    $(wildcard include/config/have/bootmem/info/node.h) \
+  include/linux/notifier.h \
+  include/linux/rwsem.h \
+    $(wildcard include/config/rwsem/spin/on/owner.h) \
+    $(wildcard include/config/rwsem/generic/spinlock.h) \
+  include/linux/rwsem_rt.h \
+  include/linux/srcu.h \
+  include/linux/rcupdate.h \
+    $(wildcard include/config/tree/rcu.h) \
+    $(wildcard include/config/preempt/rcu.h) \
+    $(wildcard include/config/rcu/trace.h) \
+    $(wildcard include/config/rcu/stall/common.h) \
+    $(wildcard include/config/rcu/user/qs.h) \
+    $(wildcard include/config/rcu/nocb/cpu.h) \
+    $(wildcard include/config/tasks/rcu.h) \
+    $(wildcard include/config/debug/objects/rcu/head.h) \
+    $(wildcard include/config/prove/rcu.h) \
+    $(wildcard include/config/rcu/boost.h) \
+    $(wildcard include/config/rcu/nocb/cpu/all.h) \
+    $(wildcard include/config/no/hz/full/sysidle.h) \
+  include/linux/completion.h \
+  include/linux/wait-simple.h \
+  include/linux/rcutree.h \
+  include/linux/topology.h \
+    $(wildcard include/config/use/percpu/numa/node/id.h) \
+    $(wildcard include/config/sched/smt.h) \
+  arch/arm/include/asm/topology.h \
+    $(wildcard include/config/arm/cpu/topology.h) \
+  include/asm-generic/topology.h \
+  include/linux/kmemleak.h \
+    $(wildcard include/config/debug/kmemleak.h) \
+  include/linux/kasan.h \
+    $(wildcard include/config/kasan.h) \
+    $(wildcard include/config/kasan/shadow/offset.h) \
+  include/linux/err.h \
+  include/linux/module.h \
+    $(wildcard include/config/module/sig.h) \
+    $(wildcard include/config/kallsyms.h) \
+    $(wildcard include/config/tracepoints.h) \
+    $(wildcard include/config/event/tracing.h) \
+    $(wildcard include/config/livepatch.h) \
+    $(wildcard include/config/module/unload.h) \
+    $(wildcard include/config/constructors.h) \
+    $(wildcard include/config/debug/set/module/ronx.h) \
+  include/linux/stat.h \
+  arch/arm/include/uapi/asm/stat.h \
+  include/uapi/linux/stat.h \
+  include/linux/uidgid.h \
+    $(wildcard include/config/multiuser.h) \
+    $(wildcard include/config/user/ns.h) \
+  include/linux/highuid.h \
+  include/linux/kmod.h \
+  include/linux/sysctl.h \
+    $(wildcard include/config/sysctl.h) \
+  include/uapi/linux/sysctl.h \
+  include/linux/elf.h \
+  arch/arm/include/asm/elf.h \
+    $(wildcard include/config/vdso.h) \
+  arch/arm/include/asm/auxvec.h \
+  arch/arm/include/uapi/asm/auxvec.h \
+  arch/arm/include/asm/vdso_datapage.h \
+  arch/arm/include/asm/user.h \
+  include/uapi/linux/elf.h \
+  include/uapi/linux/elf-em.h \
+  include/linux/kobject.h \
+    $(wildcard include/config/uevent/helper.h) \
+    $(wildcard include/config/debug/kobject/release.h) \
+  include/linux/sysfs.h \
+  include/linux/kernfs.h \
+    $(wildcard include/config/kernfs.h) \
+  include/linux/idr.h \
+  include/linux/kobject_ns.h \
+  include/linux/moduleparam.h \
+    $(wildcard include/config/alpha.h) \
+    $(wildcard include/config/ia64.h) \
+    $(wildcard include/config/ppc64.h) \
+  arch/arm/include/asm/module.h \
+    $(wildcard include/config/arm/unwind.h) \
+  include/asm-generic/module.h \
+    $(wildcard include/config/have/mod/arch/specific.h) \
+    $(wildcard include/config/modules/use/elf/rel.h) \
+    $(wildcard include/config/modules/use/elf/rela.h) \
+  include/linux/device.h \
+    $(wildcard include/config/debug/devres.h) \
+    $(wildcard include/config/pinctrl.h) \
+    $(wildcard include/config/dma/cma.h) \
+    $(wildcard include/config/of.h) \
+    $(wildcard include/config/devtmpfs.h) \
+    $(wildcard include/config/sysfs/deprecated.h) \
+  include/linux/ioport.h \
+  include/linux/klist.h \
+  include/linux/pinctrl/devinfo.h \
+    $(wildcard include/config/pm.h) \
+  include/linux/pinctrl/consumer.h \
+  include/linux/seq_file.h \
+  include/linux/pinctrl/pinctrl-state.h \
+  include/linux/pm.h \
+    $(wildcard include/config/vt/console/sleep.h) \
+    $(wildcard include/config/pm/clk.h) \
+    $(wildcard include/config/pm/generic/domains.h) \
+  include/linux/ratelimit.h \
+  arch/arm/include/asm/device.h \
+    $(wildcard include/config/dmabounce.h) \
+    $(wildcard include/config/iommu/api.h) \
+    $(wildcard include/config/arm/dma/use/iommu.h) \
+    $(wildcard include/config/arch/omap.h) \
+  include/linux/pm_wakeup.h \
+  include/linux/mailbox_client.h \
+  include/linux/of.h \
+    $(wildcard include/config/sparc.h) \
+    $(wildcard include/config/of/dynamic.h) \
+    $(wildcard include/config/attach/node.h) \
+    $(wildcard include/config/detach/node.h) \
+    $(wildcard include/config/add/property.h) \
+    $(wildcard include/config/remove/property.h) \
+    $(wildcard include/config/update/property.h) \
+    $(wildcard include/config/no/change.h) \
+    $(wildcard include/config/change/add.h) \
+    $(wildcard include/config/change/remove.h) \
+    $(wildcard include/config/of/resolve.h) \
+    $(wildcard include/config/of/overlay.h) \
+  include/linux/mod_devicetable.h \
+  include/linux/uuid.h \
+  include/uapi/linux/uuid.h \
+  include/linux/property.h \
+  include/linux/fwnode.h \
+  include/linux/mailbox_controller.h \
+  drivers/mailbox/mailbox.h \
+
+drivers/mailbox/mailbox.o: $(deps_drivers/mailbox/mailbox.o)
+
+$(deps_drivers/mailbox/mailbox.o):
diff --git a/linux/drivers/mailbox/.omap-mailbox.o.cmd b/linux/drivers/mailbox/.omap-mailbox.o.cmd
new file mode 100644
index 00000000..2139aa55
--- /dev/null
+++ b/linux/drivers/mailbox/.omap-mailbox.o.cmd
@@ -0,0 +1,742 @@
+cmd_drivers/mailbox/omap-mailbox.o := arm-linux-gnueabihf-gcc -Wp,-MD,drivers/mailbox/.omap-mailbox.o.d  -nostdinc -isystem /usr/lib/gcc-cross/arm-linux-gnueabihf/5/include -I./arch/arm/include -Iarch/arm/include/generated/uapi -Iarch/arm/include/generated  -Iinclude -I./arch/arm/include/uapi -Iarch/arm/include/generated/uapi -I./include/uapi -Iinclude/generated/uapi -include ./include/linux/kconfig.h -D__KERNEL__ -mlittle-endian -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs -fno-strict-aliasing -fno-common -Werror-implicit-function-declaration -Wno-format-security -std=gnu89 -fno-dwarf2-cfi-asm -fno-ipa-sra -mabi=aapcs-linux -mno-thumb-interwork -mfpu=vfp -funwind-tables -mthumb -Wa,-mimplicit-it=always -Wa,-mno-warn-deprecated -D__LINUX_ARM_ARCH__=7 -march=armv7-a -msoft-float -Uarm -fno-delete-null-pointer-checks -O2 --param=allow-store-data-races=0 -Wframe-larger-than=1024 -fstack-protector -Wno-unused-but-set-variable -fomit-frame-pointer -fno-var-tracking-assignments -Wdeclaration-after-statement -Wno-pointer-sign -fno-strict-overflow -fconserve-stack -Werror=implicit-int -Werror=strict-prototypes -Werror=date-time -DCC_HAVE_ASM_GOTO    -D"KBUILD_STR(s)=\#s" -D"KBUILD_BASENAME=KBUILD_STR(omap_mailbox)"  -D"KBUILD_MODNAME=KBUILD_STR(omap_mailbox)" -c -o drivers/mailbox/.tmp_omap-mailbox.o drivers/mailbox/omap-mailbox.c
+
+source_drivers/mailbox/omap-mailbox.o := drivers/mailbox/omap-mailbox.c
+
+deps_drivers/mailbox/omap-mailbox.o := \
+    $(wildcard include/config/omap/mbox/kfifo/size.h) \
+  include/linux/interrupt.h \
+    $(wildcard include/config/lockdep.h) \
+    $(wildcard include/config/smp.h) \
+    $(wildcard include/config/irq/forced/threading.h) \
+    $(wildcard include/config/preempt/rt/base.h) \
+    $(wildcard include/config/preempt/rt/full.h) \
+    $(wildcard include/config/generic/irq/probe.h) \
+    $(wildcard include/config/proc/fs.h) \
+  include/linux/kernel.h \
+    $(wildcard include/config/lbdaf.h) \
+    $(wildcard include/config/preempt/voluntary.h) \
+    $(wildcard include/config/debug/atomic/sleep.h) \
+    $(wildcard include/config/mmu.h) \
+    $(wildcard include/config/prove/locking.h) \
+    $(wildcard include/config/panic/timeout.h) \
+    $(wildcard include/config/ring/buffer.h) \
+    $(wildcard include/config/tracing.h) \
+    $(wildcard include/config/ftrace/mcount/record.h) \
+  /usr/lib/gcc-cross/arm-linux-gnueabihf/5/include/stdarg.h \
+  include/linux/linkage.h \
+  include/linux/compiler.h \
+    $(wildcard include/config/sparse/rcu/pointer.h) \
+    $(wildcard include/config/trace/branch/profiling.h) \
+    $(wildcard include/config/profile/all/branches.h) \
+    $(wildcard include/config/enable/must/check.h) \
+    $(wildcard include/config/enable/warn/deprecated.h) \
+    $(wildcard include/config/kprobes.h) \
+  include/linux/compiler-gcc.h \
+    $(wildcard include/config/arch/supports/optimized/inlining.h) \
+    $(wildcard include/config/optimize/inlining.h) \
+  include/linux/compiler-gcc5.h \
+    $(wildcard include/config/arch/use/builtin/bswap.h) \
+  include/uapi/linux/types.h \
+  arch/arm/include/asm/types.h \
+  include/asm-generic/int-ll64.h \
+  include/uapi/asm-generic/int-ll64.h \
+  arch/arm/include/generated/asm/bitsperlong.h \
+  include/asm-generic/bitsperlong.h \
+    $(wildcard include/config/64bit.h) \
+  include/uapi/asm-generic/bitsperlong.h \
+  include/uapi/linux/posix_types.h \
+  include/linux/stddef.h \
+  include/uapi/linux/stddef.h \
+  arch/arm/include/uapi/asm/posix_types.h \
+  include/uapi/asm-generic/posix_types.h \
+  include/linux/stringify.h \
+  include/linux/export.h \
+    $(wildcard include/config/have/underscore/symbol/prefix.h) \
+    $(wildcard include/config/modules.h) \
+    $(wildcard include/config/modversions.h) \
+    $(wildcard include/config/unused/symbols.h) \
+  arch/arm/include/asm/linkage.h \
+  include/linux/types.h \
+    $(wildcard include/config/uid16.h) \
+    $(wildcard include/config/arch/dma/addr/t/64bit.h) \
+    $(wildcard include/config/phys/addr/t/64bit.h) \
+  include/linux/bitops.h \
+  arch/arm/include/asm/bitops.h \
+  include/linux/irqflags.h \
+    $(wildcard include/config/trace/irqflags.h) \
+    $(wildcard include/config/irqsoff/tracer.h) \
+    $(wildcard include/config/preempt/tracer.h) \
+    $(wildcard include/config/trace/irqflags/support.h) \
+  include/linux/typecheck.h \
+  arch/arm/include/asm/irqflags.h \
+    $(wildcard include/config/cpu/v7m.h) \
+  arch/arm/include/asm/ptrace.h \
+    $(wildcard include/config/arm/thumb.h) \
+    $(wildcard include/config/thumb2/kernel.h) \
+  arch/arm/include/uapi/asm/ptrace.h \
+    $(wildcard include/config/cpu/endian/be8.h) \
+  arch/arm/include/asm/hwcap.h \
+  arch/arm/include/uapi/asm/hwcap.h \
+  arch/arm/include/asm/barrier.h \
+    $(wildcard include/config/cpu/32v6k.h) \
+    $(wildcard include/config/cpu/xsc3.h) \
+    $(wildcard include/config/cpu/fa526.h) \
+    $(wildcard include/config/arm/heavy/mb.h) \
+    $(wildcard include/config/arch/has/barriers.h) \
+    $(wildcard include/config/arm/dma/mem/bufferable.h) \
+  include/asm-generic/bitops/non-atomic.h \
+  include/asm-generic/bitops/fls64.h \
+  include/asm-generic/bitops/sched.h \
+  include/asm-generic/bitops/hweight.h \
+  include/asm-generic/bitops/arch_hweight.h \
+  include/asm-generic/bitops/const_hweight.h \
+  include/asm-generic/bitops/lock.h \
+  include/asm-generic/bitops/le.h \
+  arch/arm/include/uapi/asm/byteorder.h \
+  include/linux/byteorder/little_endian.h \
+  include/uapi/linux/byteorder/little_endian.h \
+  include/linux/swab.h \
+  include/uapi/linux/swab.h \
+  arch/arm/include/asm/swab.h \
+  arch/arm/include/uapi/asm/swab.h \
+  include/linux/byteorder/generic.h \
+  include/asm-generic/bitops/ext2-atomic-setbit.h \
+  include/linux/log2.h \
+    $(wildcard include/config/arch/has/ilog2/u32.h) \
+    $(wildcard include/config/arch/has/ilog2/u64.h) \
+  include/linux/printk.h \
+    $(wildcard include/config/message/loglevel/default.h) \
+    $(wildcard include/config/early/printk.h) \
+    $(wildcard include/config/printk.h) \
+    $(wildcard include/config/dynamic/debug.h) \
+  include/linux/init.h \
+    $(wildcard include/config/broken/rodata.h) \
+    $(wildcard include/config/lto.h) \
+  include/linux/kern_levels.h \
+  include/linux/cache.h \
+    $(wildcard include/config/arch/has/cache/line/size.h) \
+  include/uapi/linux/kernel.h \
+  include/uapi/linux/sysinfo.h \
+  arch/arm/include/asm/cache.h \
+    $(wildcard include/config/arm/l1/cache/shift.h) \
+    $(wildcard include/config/aeabi.h) \
+  include/linux/dynamic_debug.h \
+  arch/arm/include/asm/div64.h \
+  arch/arm/include/asm/compiler.h \
+  arch/arm/include/asm/bug.h \
+    $(wildcard include/config/bug.h) \
+    $(wildcard include/config/debug/bugverbose.h) \
+    $(wildcard include/config/arm/lpae.h) \
+  arch/arm/include/asm/opcodes.h \
+    $(wildcard include/config/cpu/endian/be32.h) \
+  include/asm-generic/bug.h \
+    $(wildcard include/config/generic/bug.h) \
+    $(wildcard include/config/generic/bug/relative/pointers.h) \
+  include/linux/preempt.h \
+    $(wildcard include/config/debug/preempt.h) \
+    $(wildcard include/config/preempt/lazy.h) \
+    $(wildcard include/config/preempt/count.h) \
+    $(wildcard include/config/preempt.h) \
+    $(wildcard include/config/context/tracking.h) \
+    $(wildcard include/config/preempt/notifiers.h) \
+  include/linux/list.h \
+    $(wildcard include/config/debug/list.h) \
+  include/linux/poison.h \
+    $(wildcard include/config/illegal/pointer/value.h) \
+  include/uapi/linux/const.h \
+  arch/arm/include/generated/asm/preempt.h \
+  include/asm-generic/preempt.h \
+  include/linux/thread_info.h \
+    $(wildcard include/config/compat.h) \
+    $(wildcard include/config/debug/stack/usage.h) \
+  include/linux/bug.h \
+  arch/arm/include/asm/thread_info.h \
+    $(wildcard include/config/crunch.h) \
+    $(wildcard include/config/arm/thumbee.h) \
+  arch/arm/include/asm/fpstate.h \
+    $(wildcard include/config/vfpv3.h) \
+    $(wildcard include/config/iwmmxt.h) \
+  arch/arm/include/asm/page.h \
+    $(wildcard include/config/cpu/copy/v4wt.h) \
+    $(wildcard include/config/cpu/copy/v4wb.h) \
+    $(wildcard include/config/cpu/copy/feroceon.h) \
+    $(wildcard include/config/cpu/copy/fa.h) \
+    $(wildcard include/config/cpu/sa1100.h) \
+    $(wildcard include/config/cpu/xscale.h) \
+    $(wildcard include/config/cpu/copy/v6.h) \
+    $(wildcard include/config/kuser/helpers.h) \
+    $(wildcard include/config/have/arch/pfn/valid.h) \
+  arch/arm/include/asm/glue.h \
+  arch/arm/include/asm/pgtable-2level-types.h \
+  arch/arm/include/asm/memory.h \
+    $(wildcard include/config/need/mach/memory/h.h) \
+    $(wildcard include/config/page/offset.h) \
+    $(wildcard include/config/highmem.h) \
+    $(wildcard include/config/dram/base.h) \
+    $(wildcard include/config/dram/size.h) \
+    $(wildcard include/config/have/tcm.h) \
+    $(wildcard include/config/arm/patch/phys/virt.h) \
+    $(wildcard include/config/phys/offset.h) \
+    $(wildcard include/config/virt/to/bus.h) \
+  include/linux/sizes.h \
+  include/asm-generic/memory_model.h \
+    $(wildcard include/config/flatmem.h) \
+    $(wildcard include/config/discontigmem.h) \
+    $(wildcard include/config/sparsemem/vmemmap.h) \
+    $(wildcard include/config/sparsemem.h) \
+  include/asm-generic/getorder.h \
+  arch/arm/include/asm/domain.h \
+    $(wildcard include/config/io/36.h) \
+    $(wildcard include/config/cpu/use/domains.h) \
+  include/linux/cpumask.h \
+    $(wildcard include/config/cpumask/offstack.h) \
+    $(wildcard include/config/hotplug/cpu.h) \
+    $(wildcard include/config/debug/per/cpu/maps.h) \
+  include/linux/threads.h \
+    $(wildcard include/config/nr/cpus.h) \
+    $(wildcard include/config/base/small.h) \
+  include/linux/bitmap.h \
+  include/linux/string.h \
+    $(wildcard include/config/binary/printf.h) \
+  include/uapi/linux/string.h \
+  arch/arm/include/asm/string.h \
+  include/linux/irqreturn.h \
+  include/linux/irqnr.h \
+  include/uapi/linux/irqnr.h \
+  include/linux/hardirq.h \
+    $(wildcard include/config/tiny/rcu.h) \
+  include/linux/preempt_mask.h \
+  include/linux/lockdep.h \
+    $(wildcard include/config/lock/stat.h) \
+  include/linux/ftrace_irq.h \
+    $(wildcard include/config/ftrace/nmi/enter.h) \
+  include/linux/vtime.h \
+    $(wildcard include/config/virt/cpu/accounting/native.h) \
+    $(wildcard include/config/virt/cpu/accounting/gen.h) \
+    $(wildcard include/config/virt/cpu/accounting.h) \
+    $(wildcard include/config/irq/time/accounting.h) \
+  include/linux/context_tracking_state.h \
+  include/linux/percpu.h \
+    $(wildcard include/config/need/per/cpu/embed/first/chunk.h) \
+    $(wildcard include/config/need/per/cpu/page/first/chunk.h) \
+    $(wildcard include/config/have/setup/per/cpu/area.h) \
+  include/linux/mmdebug.h \
+    $(wildcard include/config/debug/vm.h) \
+    $(wildcard include/config/debug/virtual.h) \
+  include/linux/smp.h \
+    $(wildcard include/config/up/late/init.h) \
+  include/linux/errno.h \
+  include/uapi/linux/errno.h \
+  arch/arm/include/generated/asm/errno.h \
+  include/uapi/asm-generic/errno.h \
+  include/uapi/asm-generic/errno-base.h \
+  include/linux/llist.h \
+    $(wildcard include/config/arch/have/nmi/safe/cmpxchg.h) \
+  arch/arm/include/asm/cmpxchg.h \
+    $(wildcard include/config/cpu/sa110.h) \
+    $(wildcard include/config/cpu/v6.h) \
+  include/linux/prefetch.h \
+  arch/arm/include/asm/processor.h \
+    $(wildcard include/config/have/hw/breakpoint.h) \
+    $(wildcard include/config/arm/errata/754327.h) \
+  arch/arm/include/asm/hw_breakpoint.h \
+  arch/arm/include/asm/unified.h \
+    $(wildcard include/config/arm/asm/unified.h) \
+  include/asm-generic/cmpxchg-local.h \
+  include/linux/pfn.h \
+  arch/arm/include/asm/percpu.h \
+  include/asm-generic/percpu.h \
+  include/linux/percpu-defs.h \
+    $(wildcard include/config/debug/force/weak/per/cpu.h) \
+  include/linux/static_key.h \
+  include/linux/jump_label.h \
+    $(wildcard include/config/jump/label.h) \
+  include/linux/atomic.h \
+    $(wildcard include/config/arch/has/atomic/or.h) \
+    $(wildcard include/config/generic/atomic64.h) \
+  arch/arm/include/asm/atomic.h \
+  include/asm-generic/atomic-long.h \
+  arch/arm/include/asm/hardirq.h \
+  arch/arm/include/asm/irq.h \
+    $(wildcard include/config/sparse/irq.h) \
+    $(wildcard include/config/multi/irq/handler.h) \
+  include/linux/irq_cpustat.h \
+  include/linux/hrtimer.h \
+    $(wildcard include/config/missed/timer/offsets/hist.h) \
+    $(wildcard include/config/timer/stats.h) \
+    $(wildcard include/config/high/res/timers.h) \
+    $(wildcard include/config/timerfd.h) \
+    $(wildcard include/config/debug/objects/timers.h) \
+  include/linux/rbtree.h \
+  include/linux/ktime.h \
+  include/linux/time.h \
+    $(wildcard include/config/arch/uses/gettimeoffset.h) \
+  include/linux/seqlock.h \
+    $(wildcard include/config/debug/lock/alloc.h) \
+  include/linux/spinlock.h \
+    $(wildcard include/config/debug/spinlock.h) \
+    $(wildcard include/config/generic/lockbreak.h) \
+  include/linux/bottom_half.h \
+  include/linux/spinlock_types.h \
+  include/linux/spinlock_types_raw.h \
+  include/linux/spinlock_types_up.h \
+  include/linux/rtmutex.h \
+    $(wildcard include/config/debug/mutexes.h) \
+    $(wildcard include/config/debug/rt/mutexes.h) \
+  include/linux/spinlock_types_rt.h \
+  include/linux/rwlock_types_rt.h \
+  include/linux/spinlock_up.h \
+  include/linux/rwlock_rt.h \
+  include/linux/spinlock_api_up.h \
+  include/linux/spinlock_rt.h \
+  include/linux/math64.h \
+    $(wildcard include/config/arch/supports/int128.h) \
+  include/linux/time64.h \
+  include/uapi/linux/time.h \
+  include/linux/jiffies.h \
+  include/linux/timex.h \
+  include/uapi/linux/timex.h \
+  include/uapi/linux/param.h \
+  arch/arm/include/generated/asm/param.h \
+  include/asm-generic/param.h \
+    $(wildcard include/config/hz.h) \
+  include/uapi/asm-generic/param.h \
+  arch/arm/include/asm/timex.h \
+  include/linux/timekeeping.h \
+  include/linux/wait.h \
+  arch/arm/include/generated/asm/current.h \
+  include/asm-generic/current.h \
+  include/uapi/linux/wait.h \
+  include/linux/timer.h \
+  include/linux/debugobjects.h \
+    $(wildcard include/config/debug/objects.h) \
+    $(wildcard include/config/debug/objects/free.h) \
+  include/linux/timerqueue.h \
+  include/linux/kref.h \
+  include/linux/mutex.h \
+    $(wildcard include/config/mutex/spin/on/owner.h) \
+  include/linux/osq_lock.h \
+  include/linux/mutex_rt.h \
+  include/linux/workqueue.h \
+    $(wildcard include/config/debug/objects/work.h) \
+    $(wildcard include/config/freezer.h) \
+    $(wildcard include/config/sysfs.h) \
+  include/linux/slab.h \
+    $(wildcard include/config/debug/slab.h) \
+    $(wildcard include/config/kmemcheck.h) \
+    $(wildcard include/config/failslab.h) \
+    $(wildcard include/config/slab.h) \
+    $(wildcard include/config/slub.h) \
+    $(wildcard include/config/slob.h) \
+    $(wildcard include/config/zone/dma.h) \
+    $(wildcard include/config/numa.h) \
+  include/linux/gfp.h \
+    $(wildcard include/config/zone/dma32.h) \
+    $(wildcard include/config/pm/sleep.h) \
+    $(wildcard include/config/cma.h) \
+  include/linux/mmzone.h \
+    $(wildcard include/config/force/max/zoneorder.h) \
+    $(wildcard include/config/memory/isolation.h) \
+    $(wildcard include/config/memcg.h) \
+    $(wildcard include/config/memory/hotplug.h) \
+    $(wildcard include/config/compaction.h) \
+    $(wildcard include/config/have/memblock/node/map.h) \
+    $(wildcard include/config/flat/node/mem/map.h) \
+    $(wildcard include/config/page/extension.h) \
+    $(wildcard include/config/no/bootmem.h) \
+    $(wildcard include/config/numa/balancing.h) \
+    $(wildcard include/config/have/memory/present.h) \
+    $(wildcard include/config/have/memoryless/nodes.h) \
+    $(wildcard include/config/need/node/memmap/size.h) \
+    $(wildcard include/config/need/multiple/nodes.h) \
+    $(wildcard include/config/have/arch/early/pfn/to/nid.h) \
+    $(wildcard include/config/sparsemem/extreme.h) \
+    $(wildcard include/config/nodes/span/other/nodes.h) \
+    $(wildcard include/config/holes/in/zone.h) \
+    $(wildcard include/config/arch/has/holes/memorymodel.h) \
+  include/linux/numa.h \
+    $(wildcard include/config/nodes/shift.h) \
+  include/linux/nodemask.h \
+    $(wildcard include/config/movable/node.h) \
+  include/linux/pageblock-flags.h \
+    $(wildcard include/config/hugetlb/page.h) \
+    $(wildcard include/config/hugetlb/page/size/variable.h) \
+  include/linux/page-flags-layout.h \
+  include/generated/bounds.h \
+  include/linux/memory_hotplug.h \
+    $(wildcard include/config/memory/hotremove.h) \
+    $(wildcard include/config/have/arch/nodedata/extension.h) \
+    $(wildcard include/config/have/bootmem/info/node.h) \
+  include/linux/notifier.h \
+  include/linux/rwsem.h \
+    $(wildcard include/config/rwsem/spin/on/owner.h) \
+    $(wildcard include/config/rwsem/generic/spinlock.h) \
+  include/linux/rwsem_rt.h \
+  include/linux/srcu.h \
+  include/linux/rcupdate.h \
+    $(wildcard include/config/tree/rcu.h) \
+    $(wildcard include/config/preempt/rcu.h) \
+    $(wildcard include/config/rcu/trace.h) \
+    $(wildcard include/config/rcu/stall/common.h) \
+    $(wildcard include/config/rcu/user/qs.h) \
+    $(wildcard include/config/rcu/nocb/cpu.h) \
+    $(wildcard include/config/tasks/rcu.h) \
+    $(wildcard include/config/debug/objects/rcu/head.h) \
+    $(wildcard include/config/prove/rcu.h) \
+    $(wildcard include/config/rcu/boost.h) \
+    $(wildcard include/config/rcu/nocb/cpu/all.h) \
+    $(wildcard include/config/no/hz/full/sysidle.h) \
+  include/linux/completion.h \
+  include/linux/wait-simple.h \
+  include/linux/rcutree.h \
+  include/linux/topology.h \
+    $(wildcard include/config/use/percpu/numa/node/id.h) \
+    $(wildcard include/config/sched/smt.h) \
+  arch/arm/include/asm/topology.h \
+    $(wildcard include/config/arm/cpu/topology.h) \
+  include/asm-generic/topology.h \
+  include/linux/kmemleak.h \
+    $(wildcard include/config/debug/kmemleak.h) \
+  include/linux/kasan.h \
+    $(wildcard include/config/kasan.h) \
+    $(wildcard include/config/kasan/shadow/offset.h) \
+  include/linux/kfifo.h \
+  include/linux/scatterlist.h \
+    $(wildcard include/config/debug/sg.h) \
+    $(wildcard include/config/arch/has/sg/chain.h) \
+  include/linux/mm.h \
+    $(wildcard include/config/sysctl.h) \
+    $(wildcard include/config/mem/soft/dirty.h) \
+    $(wildcard include/config/x86.h) \
+    $(wildcard include/config/ppc.h) \
+    $(wildcard include/config/parisc.h) \
+    $(wildcard include/config/metag.h) \
+    $(wildcard include/config/ia64.h) \
+    $(wildcard include/config/stack/growsup.h) \
+    $(wildcard include/config/transparent/hugepage.h) \
+    $(wildcard include/config/shmem.h) \
+    $(wildcard include/config/debug/vm/rb.h) \
+    $(wildcard include/config/debug/pagealloc.h) \
+    $(wildcard include/config/hibernation.h) \
+    $(wildcard include/config/hugetlbfs.h) \
+  include/linux/debug_locks.h \
+    $(wildcard include/config/debug/locking/api/selftests.h) \
+  include/linux/mm_types.h \
+    $(wildcard include/config/split/ptlock/cpus.h) \
+    $(wildcard include/config/arch/enable/split/pmd/ptlock.h) \
+    $(wildcard include/config/have/cmpxchg/double.h) \
+    $(wildcard include/config/have/aligned/struct/page.h) \
+    $(wildcard include/config/pgtable/levels.h) \
+    $(wildcard include/config/aio.h) \
+    $(wildcard include/config/mmu/notifier.h) \
+    $(wildcard include/config/x86/intel/mpx.h) \
+  include/linux/auxvec.h \
+  include/uapi/linux/auxvec.h \
+  arch/arm/include/asm/auxvec.h \
+  arch/arm/include/uapi/asm/auxvec.h \
+  include/linux/uprobes.h \
+    $(wildcard include/config/uprobes.h) \
+  arch/arm/include/asm/mmu.h \
+    $(wildcard include/config/cpu/has/asid.h) \
+    $(wildcard include/config/vdso.h) \
+  include/linux/range.h \
+  include/linux/bit_spinlock.h \
+  include/linux/shrinker.h \
+  include/linux/resource.h \
+  include/uapi/linux/resource.h \
+  arch/arm/include/generated/asm/resource.h \
+  include/asm-generic/resource.h \
+  include/uapi/asm-generic/resource.h \
+  include/linux/page_ext.h \
+    $(wildcard include/config/page/owner.h) \
+  include/linux/stacktrace.h \
+    $(wildcard include/config/stacktrace.h) \
+    $(wildcard include/config/user/stacktrace/support.h) \
+  arch/arm/include/asm/pgtable.h \
+    $(wildcard include/config/highpte.h) \
+  arch/arm/include/asm/proc-fns.h \
+  arch/arm/include/asm/glue-proc.h \
+    $(wildcard include/config/cpu/arm7tdmi.h) \
+    $(wildcard include/config/cpu/arm720t.h) \
+    $(wildcard include/config/cpu/arm740t.h) \
+    $(wildcard include/config/cpu/arm9tdmi.h) \
+    $(wildcard include/config/cpu/arm920t.h) \
+    $(wildcard include/config/cpu/arm922t.h) \
+    $(wildcard include/config/cpu/arm925t.h) \
+    $(wildcard include/config/cpu/arm926t.h) \
+    $(wildcard include/config/cpu/arm940t.h) \
+    $(wildcard include/config/cpu/arm946e.h) \
+    $(wildcard include/config/cpu/arm1020.h) \
+    $(wildcard include/config/cpu/arm1020e.h) \
+    $(wildcard include/config/cpu/arm1022.h) \
+    $(wildcard include/config/cpu/arm1026.h) \
+    $(wildcard include/config/cpu/mohawk.h) \
+    $(wildcard include/config/cpu/feroceon.h) \
+    $(wildcard include/config/cpu/v6k.h) \
+    $(wildcard include/config/cpu/pj4b.h) \
+    $(wildcard include/config/cpu/v7.h) \
+  include/asm-generic/pgtable-nopud.h \
+  arch/arm/include/asm/pgtable-hwdef.h \
+  arch/arm/include/asm/pgtable-2level-hwdef.h \
+  arch/arm/include/asm/tlbflush.h \
+    $(wildcard include/config/smp/on/up.h) \
+    $(wildcard include/config/cpu/tlb/v4wt.h) \
+    $(wildcard include/config/cpu/tlb/fa.h) \
+    $(wildcard include/config/cpu/tlb/v4wbi.h) \
+    $(wildcard include/config/cpu/tlb/feroceon.h) \
+    $(wildcard include/config/cpu/tlb/v4wb.h) \
+    $(wildcard include/config/cpu/tlb/v6.h) \
+    $(wildcard include/config/cpu/tlb/v7.h) \
+    $(wildcard include/config/arm/errata/720789.h) \
+    $(wildcard include/config/arm/errata/798181.h) \
+  include/linux/sched.h \
+    $(wildcard include/config/sched/debug.h) \
+    $(wildcard include/config/no/hz/common.h) \
+    $(wildcard include/config/lockup/detector.h) \
+    $(wildcard include/config/detect/hung/task.h) \
+    $(wildcard include/config/core/dump/default/elf/headers.h) \
+    $(wildcard include/config/sched/autogroup.h) \
+    $(wildcard include/config/bsd/process/acct.h) \
+    $(wildcard include/config/taskstats.h) \
+    $(wildcard include/config/audit.h) \
+    $(wildcard include/config/cgroups.h) \
+    $(wildcard include/config/inotify/user.h) \
+    $(wildcard include/config/fanotify.h) \
+    $(wildcard include/config/epoll.h) \
+    $(wildcard include/config/posix/mqueue.h) \
+    $(wildcard include/config/keys.h) \
+    $(wildcard include/config/perf/events.h) \
+    $(wildcard include/config/schedstats.h) \
+    $(wildcard include/config/task/delay/acct.h) \
+    $(wildcard include/config/sched/mc.h) \
+    $(wildcard include/config/fair/group/sched.h) \
+    $(wildcard include/config/rt/group/sched.h) \
+    $(wildcard include/config/cgroup/sched.h) \
+    $(wildcard include/config/blk/dev/io/trace.h) \
+    $(wildcard include/config/compat/brk.h) \
+    $(wildcard include/config/memcg/kmem.h) \
+    $(wildcard include/config/cc/stackprotector.h) \
+    $(wildcard include/config/sysvipc.h) \
+    $(wildcard include/config/auditsyscall.h) \
+    $(wildcard include/config/rt/mutexes.h) \
+    $(wildcard include/config/block.h) \
+    $(wildcard include/config/task/xacct.h) \
+    $(wildcard include/config/cpusets.h) \
+    $(wildcard include/config/futex.h) \
+    $(wildcard include/config/fault/injection.h) \
+    $(wildcard include/config/latencytop.h) \
+    $(wildcard include/config/function/graph/tracer.h) \
+    $(wildcard include/config/wakeup/latency/hist.h) \
+    $(wildcard include/config/bcache.h) \
+    $(wildcard include/config/x86/32.h) \
+    $(wildcard include/config/have/unstable/sched/clock.h) \
+    $(wildcard include/config/no/hz/full.h) \
+  include/uapi/linux/sched.h \
+  include/linux/sched/prio.h \
+  include/linux/capability.h \
+    $(wildcard include/config/multiuser.h) \
+  include/uapi/linux/capability.h \
+  include/linux/plist.h \
+    $(wildcard include/config/debug/pi/list.h) \
+  arch/arm/include/asm/kmap_types.h \
+  include/linux/cputime.h \
+  arch/arm/include/generated/asm/cputime.h \
+  include/asm-generic/cputime.h \
+  include/asm-generic/cputime_jiffies.h \
+  include/linux/sem.h \
+  include/uapi/linux/sem.h \
+  include/linux/ipc.h \
+  include/linux/uidgid.h \
+    $(wildcard include/config/user/ns.h) \
+  include/linux/highuid.h \
+  include/uapi/linux/ipc.h \
+  arch/arm/include/generated/asm/ipcbuf.h \
+  include/uapi/asm-generic/ipcbuf.h \
+  arch/arm/include/generated/asm/sembuf.h \
+  include/uapi/asm-generic/sembuf.h \
+  include/linux/shm.h \
+  include/uapi/linux/shm.h \
+  arch/arm/include/generated/asm/shmbuf.h \
+  include/uapi/asm-generic/shmbuf.h \
+  arch/arm/include/asm/shmparam.h \
+  include/linux/signal.h \
+    $(wildcard include/config/old/sigaction.h) \
+  include/uapi/linux/signal.h \
+  arch/arm/include/asm/signal.h \
+  arch/arm/include/uapi/asm/signal.h \
+  include/uapi/asm-generic/signal-defs.h \
+  arch/arm/include/uapi/asm/sigcontext.h \
+  arch/arm/include/generated/asm/siginfo.h \
+  include/asm-generic/siginfo.h \
+  include/uapi/asm-generic/siginfo.h \
+  include/linux/pid.h \
+  include/linux/proportions.h \
+  include/linux/percpu_counter.h \
+  include/linux/seccomp.h \
+    $(wildcard include/config/seccomp.h) \
+    $(wildcard include/config/have/arch/seccomp/filter.h) \
+    $(wildcard include/config/seccomp/filter.h) \
+  include/uapi/linux/seccomp.h \
+  arch/arm/include/generated/asm/seccomp.h \
+  include/asm-generic/seccomp.h \
+  include/uapi/linux/unistd.h \
+  arch/arm/include/asm/unistd.h \
+    $(wildcard include/config/oabi/compat.h) \
+  arch/arm/include/uapi/asm/unistd.h \
+  include/linux/rculist.h \
+  include/linux/task_io_accounting.h \
+    $(wildcard include/config/task/io/accounting.h) \
+  include/linux/latencytop.h \
+  include/linux/cred.h \
+    $(wildcard include/config/debug/credentials.h) \
+    $(wildcard include/config/security.h) \
+  include/linux/key.h \
+  include/linux/sysctl.h \
+  include/uapi/linux/sysctl.h \
+  include/linux/assoc_array.h \
+    $(wildcard include/config/associative/array.h) \
+  include/linux/selinux.h \
+    $(wildcard include/config/security/selinux.h) \
+  include/uapi/linux/magic.h \
+  arch/arm/include/asm/pgtable-2level.h \
+  include/asm-generic/pgtable.h \
+    $(wildcard include/config/have/arch/soft/dirty.h) \
+    $(wildcard include/config/have/arch/huge/vmap.h) \
+  include/linux/page-flags.h \
+    $(wildcard include/config/pageflags/extended.h) \
+    $(wildcard include/config/arch/uses/pg/uncached.h) \
+    $(wildcard include/config/memory/failure.h) \
+    $(wildcard include/config/swap.h) \
+    $(wildcard include/config/ksm.h) \
+  include/linux/huge_mm.h \
+  include/linux/vmstat.h \
+    $(wildcard include/config/vm/event/counters.h) \
+    $(wildcard include/config/debug/tlbflush.h) \
+    $(wildcard include/config/debug/vm/vmacache.h) \
+  include/linux/vm_event_item.h \
+    $(wildcard include/config/migration.h) \
+    $(wildcard include/config/memory/balloon.h) \
+    $(wildcard include/config/balloon/compaction.h) \
+  arch/arm/include/generated/asm/scatterlist.h \
+  include/asm-generic/scatterlist.h \
+    $(wildcard include/config/need/sg/dma/length.h) \
+  arch/arm/include/asm/io.h \
+    $(wildcard include/config/pci.h) \
+    $(wildcard include/config/need/mach/io/h.h) \
+    $(wildcard include/config/pcmcia/soc/common.h) \
+    $(wildcard include/config/isa.h) \
+    $(wildcard include/config/pccard.h) \
+  include/linux/blk_types.h \
+    $(wildcard include/config/blk/cgroup.h) \
+    $(wildcard include/config/blk/dev/integrity.h) \
+  include/asm-generic/pci_iomap.h \
+    $(wildcard include/config/no/generic/pci/ioport/map.h) \
+    $(wildcard include/config/generic/pci/iomap.h) \
+  include/xen/xen.h \
+    $(wildcard include/config/xen.h) \
+    $(wildcard include/config/xen/dom0.h) \
+    $(wildcard include/config/xen/pvh.h) \
+  include/asm-generic/io.h \
+    $(wildcard include/config/generic/iomap.h) \
+    $(wildcard include/config/has/ioport/map.h) \
+  include/linux/vmalloc.h \
+  include/linux/err.h \
+  include/linux/module.h \
+    $(wildcard include/config/module/sig.h) \
+    $(wildcard include/config/kallsyms.h) \
+    $(wildcard include/config/tracepoints.h) \
+    $(wildcard include/config/event/tracing.h) \
+    $(wildcard include/config/livepatch.h) \
+    $(wildcard include/config/module/unload.h) \
+    $(wildcard include/config/constructors.h) \
+    $(wildcard include/config/debug/set/module/ronx.h) \
+  include/linux/stat.h \
+  arch/arm/include/uapi/asm/stat.h \
+  include/uapi/linux/stat.h \
+  include/linux/kmod.h \
+  include/linux/elf.h \
+  arch/arm/include/asm/elf.h \
+  arch/arm/include/asm/vdso_datapage.h \
+  arch/arm/include/asm/user.h \
+  include/uapi/linux/elf.h \
+  include/uapi/linux/elf-em.h \
+  include/linux/kobject.h \
+    $(wildcard include/config/uevent/helper.h) \
+    $(wildcard include/config/debug/kobject/release.h) \
+  include/linux/sysfs.h \
+  include/linux/kernfs.h \
+    $(wildcard include/config/kernfs.h) \
+  include/linux/idr.h \
+  include/linux/kobject_ns.h \
+  include/linux/moduleparam.h \
+    $(wildcard include/config/alpha.h) \
+    $(wildcard include/config/ppc64.h) \
+  arch/arm/include/asm/module.h \
+    $(wildcard include/config/arm/unwind.h) \
+  include/asm-generic/module.h \
+    $(wildcard include/config/have/mod/arch/specific.h) \
+    $(wildcard include/config/modules/use/elf/rel.h) \
+    $(wildcard include/config/modules/use/elf/rela.h) \
+  include/linux/of_device.h \
+    $(wildcard include/config/of.h) \
+  include/linux/cpu.h \
+    $(wildcard include/config/pm/sleep/smp.h) \
+  include/linux/node.h \
+    $(wildcard include/config/memory/hotplug/sparse.h) \
+  include/linux/device.h \
+    $(wildcard include/config/debug/devres.h) \
+    $(wildcard include/config/pinctrl.h) \
+    $(wildcard include/config/dma/cma.h) \
+    $(wildcard include/config/devtmpfs.h) \
+    $(wildcard include/config/sysfs/deprecated.h) \
+  include/linux/ioport.h \
+  include/linux/klist.h \
+  include/linux/pinctrl/devinfo.h \
+    $(wildcard include/config/pm.h) \
+  include/linux/pinctrl/consumer.h \
+  include/linux/seq_file.h \
+  include/linux/pinctrl/pinctrl-state.h \
+  include/linux/pm.h \
+    $(wildcard include/config/vt/console/sleep.h) \
+    $(wildcard include/config/pm/clk.h) \
+    $(wildcard include/config/pm/generic/domains.h) \
+  include/linux/ratelimit.h \
+  arch/arm/include/asm/device.h \
+    $(wildcard include/config/dmabounce.h) \
+    $(wildcard include/config/iommu/api.h) \
+    $(wildcard include/config/arm/dma/use/iommu.h) \
+    $(wildcard include/config/arch/omap.h) \
+  include/linux/pm_wakeup.h \
+  include/linux/platform_device.h \
+    $(wildcard include/config/suspend.h) \
+    $(wildcard include/config/hibernate/callbacks.h) \
+  include/linux/mod_devicetable.h \
+  include/linux/uuid.h \
+  include/uapi/linux/uuid.h \
+  include/linux/of_platform.h \
+    $(wildcard include/config/of/address.h) \
+    $(wildcard include/config/of/dynamic.h) \
+  include/linux/of.h \
+    $(wildcard include/config/sparc.h) \
+    $(wildcard include/config/attach/node.h) \
+    $(wildcard include/config/detach/node.h) \
+    $(wildcard include/config/add/property.h) \
+    $(wildcard include/config/remove/property.h) \
+    $(wildcard include/config/update/property.h) \
+    $(wildcard include/config/no/change.h) \
+    $(wildcard include/config/change/add.h) \
+    $(wildcard include/config/change/remove.h) \
+    $(wildcard include/config/of/resolve.h) \
+    $(wildcard include/config/of/overlay.h) \
+  include/linux/property.h \
+  include/linux/fwnode.h \
+  include/linux/pm_runtime.h \
+  include/linux/platform_data/mailbox-omap.h \
+  include/linux/omap-mailbox.h \
+  include/linux/mailbox_controller.h \
+  include/linux/mailbox_client.h \
+  drivers/mailbox/mailbox.h \
+
+drivers/mailbox/omap-mailbox.o: $(deps_drivers/mailbox/omap-mailbox.o)
+
+$(deps_drivers/mailbox/omap-mailbox.o):
diff --git a/linux/drivers/mailbox/Kconfig b/linux/drivers/mailbox/Kconfig
new file mode 100644
index 00000000..1a84aa3c
--- /dev/null
+++ b/linux/drivers/mailbox/Kconfig
@@ -0,0 +1,74 @@
+menuconfig MAILBOX
+	bool "Mailbox Hardware Support"
+	help
+	  Mailbox is a framework to control hardware communication between
+	  on-chip processors through queued messages and interrupt driven
+	  signals. Say Y if your platform supports hardware mailboxes.
+
+if MAILBOX
+
+config ARM_MHU
+	tristate "ARM MHU Mailbox"
+	depends on ARM_AMBA
+	help
+	  Say Y here if you want to build the ARM MHU controller driver.
+	  The controller has 3 mailbox channels, the last of which can be
+	  used in Secure mode only.
+
+config PL320_MBOX
+	bool "ARM PL320 Mailbox"
+	depends on ARM_AMBA
+	help
+	  An implementation of the ARM PL320 Interprocessor Communication
+	  Mailbox (IPCM), tailored for the Calxeda Highbank. It is used to
+	  send short messages between Highbank's A9 cores and the EnergyCore
+	  Management Engine, primarily for cpufreq. Say Y here if you want
+	  to use the PL320 IPCM support.
+
+config OMAP2PLUS_MBOX
+	tristate "OMAP2+ Mailbox framework support"
+	depends on ARCH_OMAP2PLUS
+	help
+	  Mailbox implementation for OMAP family chips with hardware for
+	  interprocessor communication involving DSP, IVA1.0 and IVA2 in
+	  OMAP2/3; or IPU, IVA HD and DSP in OMAP4/5. Say Y here if you
+	  want to use OMAP2+ Mailbox framework support.
+
+config OMAP_MBOX_KFIFO_SIZE
+	int "Mailbox kfifo default buffer size (bytes)"
+	depends on OMAP2PLUS_MBOX
+	default 256
+	help
+	  Specify the default size of mailbox's kfifo buffers (bytes).
+	  This can also be changed at runtime (via the mbox_kfifo_size
+	  module parameter).
+
+config PCC
+	bool "Platform Communication Channel Driver"
+	depends on ACPI
+	help
+	  ACPI 5.0+ spec defines a generic mode of communication
+	  between the OS and a platform such as the BMC. This medium
+	  (PCC) is typically used by CPPC (ACPI CPU Performance management),
+	  RAS (ACPI reliability protocol) and MPST (ACPI Memory power
+	  states). Select this driver if your platform implements the
+	  PCC clients mentioned above.
+
+config TI_MESSAGE_MANAGER
+	bool "Texas Instruments MessageManager Driver"
+	depends on ARCH_KEYSTONE
+	help
+	  An implementation of Message Manager slave driver for Keystone
+	  architecture SoCs from Texas Instruments. Message Manager is a
+	  communication entity found on few of Texas Instrument's keystone
+	  architecture SoCs. These may be used for communication between
+	  multiple processors within the SoC. Select this driver if your
+	  platform has support for the hardware block.
+
+config ALTERA_MBOX
+	tristate "Altera Mailbox"
+	help
+	  An implementation of the Altera Mailbox soft core. It is used
+	  to send message between processors. Say Y here if you want to use the
+	  Altera mailbox support.
+endif
diff --git a/linux/drivers/mailbox/Makefile b/linux/drivers/mailbox/Makefile
new file mode 100644
index 00000000..aeb75b3e
--- /dev/null
+++ b/linux/drivers/mailbox/Makefile
@@ -0,0 +1,15 @@
+# Generic MAILBOX API
+
+obj-$(CONFIG_MAILBOX)		+= mailbox.o
+
+obj-$(CONFIG_ARM_MHU)	+= arm_mhu.o
+
+obj-$(CONFIG_PL320_MBOX)	+= pl320-ipc.o
+
+obj-$(CONFIG_OMAP2PLUS_MBOX)	+= omap-mailbox.o
+
+obj-$(CONFIG_PCC)		+= pcc.o
+
+obj-$(CONFIG_TI_MESSAGE_MANAGER) += ti-msgmgr.o
+
+obj-$(CONFIG_ALTERA_MBOX)	+= mailbox-altera.o
diff --git a/linux/drivers/mailbox/arm_mhu.c b/linux/drivers/mailbox/arm_mhu.c
new file mode 100644
index 00000000..d9e99f98
--- /dev/null
+++ b/linux/drivers/mailbox/arm_mhu.c
@@ -0,0 +1,195 @@
+/*
+ * Copyright (C) 2013-2015 Fujitsu Semiconductor Ltd.
+ * Copyright (C) 2015 Linaro Ltd.
+ * Author: Jassi Brar <jaswinder.singh@linaro.org>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/interrupt.h>
+#include <linux/spinlock.h>
+#include <linux/mutex.h>
+#include <linux/delay.h>
+#include <linux/slab.h>
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/amba/bus.h>
+#include <linux/mailbox_controller.h>
+
+#define INTR_STAT_OFS	0x0
+#define INTR_SET_OFS	0x8
+#define INTR_CLR_OFS	0x10
+
+#define MHU_LP_OFFSET	0x0
+#define MHU_HP_OFFSET	0x20
+#define MHU_SEC_OFFSET	0x200
+#define TX_REG_OFFSET	0x100
+
+#define MHU_CHANS	3
+
+struct mhu_link {
+	unsigned irq;
+	void __iomem *tx_reg;
+	void __iomem *rx_reg;
+};
+
+struct arm_mhu {
+	void __iomem *base;
+	struct mhu_link mlink[MHU_CHANS];
+	struct mbox_chan chan[MHU_CHANS];
+	struct mbox_controller mbox;
+};
+
+static irqreturn_t mhu_rx_interrupt(int irq, void *p)
+{
+	struct mbox_chan *chan = p;
+	struct mhu_link *mlink = chan->con_priv;
+	u32 val;
+
+	val = readl_relaxed(mlink->rx_reg + INTR_STAT_OFS);
+	if (!val)
+		return IRQ_NONE;
+
+	mbox_chan_received_data(chan, (void *)&val);
+
+	writel_relaxed(val, mlink->rx_reg + INTR_CLR_OFS);
+
+	return IRQ_HANDLED;
+}
+
+static bool mhu_last_tx_done(struct mbox_chan *chan)
+{
+	struct mhu_link *mlink = chan->con_priv;
+	u32 val = readl_relaxed(mlink->tx_reg + INTR_STAT_OFS);
+
+	return (val == 0);
+}
+
+static int mhu_send_data(struct mbox_chan *chan, void *data)
+{
+	struct mhu_link *mlink = chan->con_priv;
+	u32 *arg = data;
+
+	writel_relaxed(*arg, mlink->tx_reg + INTR_SET_OFS);
+
+	return 0;
+}
+
+static int mhu_startup(struct mbox_chan *chan)
+{
+	struct mhu_link *mlink = chan->con_priv;
+	u32 val;
+	int ret;
+
+	val = readl_relaxed(mlink->tx_reg + INTR_STAT_OFS);
+	writel_relaxed(val, mlink->tx_reg + INTR_CLR_OFS);
+
+	ret = request_irq(mlink->irq, mhu_rx_interrupt,
+			  IRQF_SHARED, "mhu_link", chan);
+	if (ret) {
+		dev_err(chan->mbox->dev,
+			"Unable to aquire IRQ %d\n", mlink->irq);
+		return ret;
+	}
+
+	return 0;
+}
+
+static void mhu_shutdown(struct mbox_chan *chan)
+{
+	struct mhu_link *mlink = chan->con_priv;
+
+	free_irq(mlink->irq, chan);
+}
+
+static const struct mbox_chan_ops mhu_ops = {
+	.send_data = mhu_send_data,
+	.startup = mhu_startup,
+	.shutdown = mhu_shutdown,
+	.last_tx_done = mhu_last_tx_done,
+};
+
+static int mhu_probe(struct amba_device *adev, const struct amba_id *id)
+{
+	int i, err;
+	struct arm_mhu *mhu;
+	struct device *dev = &adev->dev;
+	int mhu_reg[MHU_CHANS] = {MHU_LP_OFFSET, MHU_HP_OFFSET, MHU_SEC_OFFSET};
+
+	/* Allocate memory for device */
+	mhu = devm_kzalloc(dev, sizeof(*mhu), GFP_KERNEL);
+	if (!mhu)
+		return -ENOMEM;
+
+	mhu->base = devm_ioremap_resource(dev, &adev->res);
+	if (IS_ERR(mhu->base)) {
+		dev_err(dev, "ioremap failed\n");
+		return PTR_ERR(mhu->base);
+	}
+
+	for (i = 0; i < MHU_CHANS; i++) {
+		mhu->chan[i].con_priv = &mhu->mlink[i];
+		mhu->mlink[i].irq = adev->irq[i];
+		mhu->mlink[i].rx_reg = mhu->base + mhu_reg[i];
+		mhu->mlink[i].tx_reg = mhu->mlink[i].rx_reg + TX_REG_OFFSET;
+	}
+
+	mhu->mbox.dev = dev;
+	mhu->mbox.chans = &mhu->chan[0];
+	mhu->mbox.num_chans = MHU_CHANS;
+	mhu->mbox.ops = &mhu_ops;
+	mhu->mbox.txdone_irq = false;
+	mhu->mbox.txdone_poll = true;
+	mhu->mbox.txpoll_period = 10;
+
+	amba_set_drvdata(adev, mhu);
+
+	err = mbox_controller_register(&mhu->mbox);
+	if (err) {
+		dev_err(dev, "Failed to register mailboxes %d\n", err);
+		return err;
+	}
+
+	dev_info(dev, "ARM MHU Mailbox registered\n");
+	return 0;
+}
+
+static int mhu_remove(struct amba_device *adev)
+{
+	struct arm_mhu *mhu = amba_get_drvdata(adev);
+
+	mbox_controller_unregister(&mhu->mbox);
+
+	return 0;
+}
+
+static struct amba_id mhu_ids[] = {
+	{
+		.id	= 0x1bb098,
+		.mask	= 0xffffff,
+	},
+	{ 0, 0 },
+};
+MODULE_DEVICE_TABLE(amba, mhu_ids);
+
+static struct amba_driver arm_mhu_driver = {
+	.drv = {
+		.name	= "mhu",
+	},
+	.id_table	= mhu_ids,
+	.probe		= mhu_probe,
+	.remove		= mhu_remove,
+};
+module_amba_driver(arm_mhu_driver);
+
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("ARM MHU Driver");
+MODULE_AUTHOR("Jassi Brar <jassisinghbrar@gmail.com>");
diff --git a/linux/drivers/mailbox/built-in.o b/linux/drivers/mailbox/built-in.o
new file mode 100644
index 00000000..19ad93ff
--- /dev/null
+++ b/linux/drivers/mailbox/built-in.o
diff --git a/linux/drivers/mailbox/mailbox-altera.c b/linux/drivers/mailbox/mailbox-altera.c
new file mode 100644
index 00000000..bb682c92
--- /dev/null
+++ b/linux/drivers/mailbox/mailbox-altera.c
@@ -0,0 +1,388 @@
+/*
+ * Copyright Altera Corporation (C) 2013-2014. All rights reserved
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/device.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/mailbox_controller.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+
+#define DRIVER_NAME	"altera-mailbox"
+
+#define MAILBOX_CMD_REG			0x00
+#define MAILBOX_PTR_REG			0x04
+#define MAILBOX_STS_REG			0x08
+#define MAILBOX_INTMASK_REG		0x0C
+
+#define INT_PENDING_MSK			0x1
+#define INT_SPACE_MSK			0x2
+
+#define STS_PENDING_MSK			0x1
+#define STS_FULL_MSK			0x2
+#define STS_FULL_OFT			0x1
+
+#define MBOX_PENDING(status)	(((status) & STS_PENDING_MSK))
+#define MBOX_FULL(status)	(((status) & STS_FULL_MSK) >> STS_FULL_OFT)
+
+enum altera_mbox_msg {
+	MBOX_CMD = 0,
+	MBOX_PTR,
+};
+
+#define MBOX_POLLING_MS		5	/* polling interval 5ms */
+
+struct altera_mbox {
+	bool is_sender;		/* 1-sender, 0-receiver */
+	bool intr_mode;
+	int irq;
+	void __iomem *mbox_base;
+	struct device *dev;
+	struct mbox_controller controller;
+
+	/* If the controller supports only RX polling mode */
+	struct timer_list rxpoll_timer;
+};
+
+static struct altera_mbox *mbox_chan_to_altera_mbox(struct mbox_chan *chan)
+{
+	if (!chan || !chan->con_priv)
+		return NULL;
+
+	return (struct altera_mbox *)chan->con_priv;
+}
+
+static inline int altera_mbox_full(struct altera_mbox *mbox)
+{
+	u32 status;
+
+	status = readl_relaxed(mbox->mbox_base + MAILBOX_STS_REG);
+	return MBOX_FULL(status);
+}
+
+static inline int altera_mbox_pending(struct altera_mbox *mbox)
+{
+	u32 status;
+
+	status = readl_relaxed(mbox->mbox_base + MAILBOX_STS_REG);
+	return MBOX_PENDING(status);
+}
+
+static void altera_mbox_rx_intmask(struct altera_mbox *mbox, bool enable)
+{
+	u32 mask;
+
+	mask = readl_relaxed(mbox->mbox_base + MAILBOX_INTMASK_REG);
+	if (enable)
+		mask |= INT_PENDING_MSK;
+	else
+		mask &= ~INT_PENDING_MSK;
+	writel_relaxed(mask, mbox->mbox_base + MAILBOX_INTMASK_REG);
+}
+
+static void altera_mbox_tx_intmask(struct altera_mbox *mbox, bool enable)
+{
+	u32 mask;
+
+	mask = readl_relaxed(mbox->mbox_base + MAILBOX_INTMASK_REG);
+	if (enable)
+		mask |= INT_SPACE_MSK;
+	else
+		mask &= ~INT_SPACE_MSK;
+	writel_relaxed(mask, mbox->mbox_base + MAILBOX_INTMASK_REG);
+}
+
+static bool altera_mbox_is_sender(struct altera_mbox *mbox)
+{
+	u32 reg;
+	/* Write a magic number to PTR register and read back this register.
+	 * This register is read-write if it is a sender.
+	 */
+	#define MBOX_MAGIC	0xA5A5AA55
+	writel_relaxed(MBOX_MAGIC, mbox->mbox_base + MAILBOX_PTR_REG);
+	reg = readl_relaxed(mbox->mbox_base + MAILBOX_PTR_REG);
+	if (reg == MBOX_MAGIC) {
+		/* Clear to 0 */
+		writel_relaxed(0, mbox->mbox_base + MAILBOX_PTR_REG);
+		return true;
+	}
+	return false;
+}
+
+static void altera_mbox_rx_data(struct mbox_chan *chan)
+{
+	struct altera_mbox *mbox = mbox_chan_to_altera_mbox(chan);
+	u32 data[2];
+
+	if (altera_mbox_pending(mbox)) {
+		data[MBOX_PTR] =
+			readl_relaxed(mbox->mbox_base + MAILBOX_PTR_REG);
+		data[MBOX_CMD] =
+			readl_relaxed(mbox->mbox_base + MAILBOX_CMD_REG);
+		mbox_chan_received_data(chan, (void *)data);
+	}
+}
+
+static void altera_mbox_poll_rx(unsigned long data)
+{
+	struct mbox_chan *chan = (struct mbox_chan *)data;
+	struct altera_mbox *mbox = mbox_chan_to_altera_mbox(chan);
+
+	altera_mbox_rx_data(chan);
+
+	mod_timer(&mbox->rxpoll_timer,
+		  jiffies + msecs_to_jiffies(MBOX_POLLING_MS));
+}
+
+static irqreturn_t altera_mbox_tx_interrupt(int irq, void *p)
+{
+	struct mbox_chan *chan = (struct mbox_chan *)p;
+	struct altera_mbox *mbox = mbox_chan_to_altera_mbox(chan);
+
+	altera_mbox_tx_intmask(mbox, false);
+	mbox_chan_txdone(chan, 0);
+
+	return IRQ_HANDLED;
+}
+
+static irqreturn_t altera_mbox_rx_interrupt(int irq, void *p)
+{
+	struct mbox_chan *chan = (struct mbox_chan *)p;
+
+	altera_mbox_rx_data(chan);
+	return IRQ_HANDLED;
+}
+
+static int altera_mbox_startup_sender(struct mbox_chan *chan)
+{
+	int ret;
+	struct altera_mbox *mbox = mbox_chan_to_altera_mbox(chan);
+
+	if (mbox->intr_mode) {
+		ret = request_irq(mbox->irq, altera_mbox_tx_interrupt, 0,
+				  DRIVER_NAME, chan);
+		if (unlikely(ret)) {
+			dev_err(mbox->dev,
+				"failed to register mailbox interrupt:%d\n",
+				ret);
+			return ret;
+		}
+	}
+
+	return 0;
+}
+
+static int altera_mbox_startup_receiver(struct mbox_chan *chan)
+{
+	int ret;
+	struct altera_mbox *mbox = mbox_chan_to_altera_mbox(chan);
+
+	if (mbox->intr_mode) {
+		ret = request_irq(mbox->irq, altera_mbox_rx_interrupt, 0,
+				  DRIVER_NAME, chan);
+		if (unlikely(ret)) {
+			mbox->intr_mode = false;
+			goto polling; /* use polling if failed */
+		}
+
+		altera_mbox_rx_intmask(mbox, true);
+		return 0;
+	}
+
+polling:
+	/* Setup polling timer */
+	setup_timer(&mbox->rxpoll_timer, altera_mbox_poll_rx,
+		    (unsigned long)chan);
+	mod_timer(&mbox->rxpoll_timer,
+		  jiffies + msecs_to_jiffies(MBOX_POLLING_MS));
+
+	return 0;
+}
+
+static int altera_mbox_send_data(struct mbox_chan *chan, void *data)
+{
+	struct altera_mbox *mbox = mbox_chan_to_altera_mbox(chan);
+	u32 *udata = (u32 *)data;
+
+	if (!mbox || !data)
+		return -EINVAL;
+	if (!mbox->is_sender) {
+		dev_warn(mbox->dev,
+			 "failed to send. This is receiver mailbox.\n");
+		return -EINVAL;
+	}
+
+	if (altera_mbox_full(mbox))
+		return -EBUSY;
+
+	/* Enable interrupt before send */
+	if (mbox->intr_mode)
+		altera_mbox_tx_intmask(mbox, true);
+
+	/* Pointer register must write before command register */
+	writel_relaxed(udata[MBOX_PTR], mbox->mbox_base + MAILBOX_PTR_REG);
+	writel_relaxed(udata[MBOX_CMD], mbox->mbox_base + MAILBOX_CMD_REG);
+
+	return 0;
+}
+
+static bool altera_mbox_last_tx_done(struct mbox_chan *chan)
+{
+	struct altera_mbox *mbox = mbox_chan_to_altera_mbox(chan);
+
+	/* Return false if mailbox is full */
+	return altera_mbox_full(mbox) ? false : true;
+}
+
+static bool altera_mbox_peek_data(struct mbox_chan *chan)
+{
+	struct altera_mbox *mbox = mbox_chan_to_altera_mbox(chan);
+
+	return altera_mbox_pending(mbox) ? true : false;
+}
+
+static int altera_mbox_startup(struct mbox_chan *chan)
+{
+	struct altera_mbox *mbox = mbox_chan_to_altera_mbox(chan);
+	int ret = 0;
+
+	if (!mbox)
+		return -EINVAL;
+
+	if (mbox->is_sender)
+		ret = altera_mbox_startup_sender(chan);
+	else
+		ret = altera_mbox_startup_receiver(chan);
+
+	return ret;
+}
+
+static void altera_mbox_shutdown(struct mbox_chan *chan)
+{
+	struct altera_mbox *mbox = mbox_chan_to_altera_mbox(chan);
+
+	if (mbox->intr_mode) {
+		/* Unmask all interrupt masks */
+		writel_relaxed(~0, mbox->mbox_base + MAILBOX_INTMASK_REG);
+		free_irq(mbox->irq, chan);
+	} else if (!mbox->is_sender) {
+		del_timer_sync(&mbox->rxpoll_timer);
+	}
+}
+
+static const struct mbox_chan_ops altera_mbox_ops = {
+	.send_data = altera_mbox_send_data,
+	.startup = altera_mbox_startup,
+	.shutdown = altera_mbox_shutdown,
+	.last_tx_done = altera_mbox_last_tx_done,
+	.peek_data = altera_mbox_peek_data,
+};
+
+static int altera_mbox_probe(struct platform_device *pdev)
+{
+	struct altera_mbox *mbox;
+	struct resource	*regs;
+	struct mbox_chan *chans;
+	int ret;
+
+	mbox = devm_kzalloc(&pdev->dev, sizeof(*mbox),
+			    GFP_KERNEL);
+	if (!mbox)
+		return -ENOMEM;
+
+	/* Allocated one channel */
+	chans = devm_kzalloc(&pdev->dev, sizeof(*chans), GFP_KERNEL);
+	if (!chans)
+		return -ENOMEM;
+
+	regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+
+	mbox->mbox_base = devm_ioremap_resource(&pdev->dev, regs);
+	if (IS_ERR(mbox->mbox_base))
+		return PTR_ERR(mbox->mbox_base);
+
+	/* Check is it a sender or receiver? */
+	mbox->is_sender = altera_mbox_is_sender(mbox);
+
+	mbox->irq = platform_get_irq(pdev, 0);
+	if (mbox->irq >= 0)
+		mbox->intr_mode = true;
+
+	mbox->dev = &pdev->dev;
+
+	/* Hardware supports only one channel. */
+	chans[0].con_priv = mbox;
+	mbox->controller.dev = mbox->dev;
+	mbox->controller.num_chans = 1;
+	mbox->controller.chans = chans;
+	mbox->controller.ops = &altera_mbox_ops;
+
+	if (mbox->is_sender) {
+		if (mbox->intr_mode) {
+			mbox->controller.txdone_irq = true;
+		} else {
+			mbox->controller.txdone_poll = true;
+			mbox->controller.txpoll_period = MBOX_POLLING_MS;
+		}
+	}
+
+	ret = mbox_controller_register(&mbox->controller);
+	if (ret) {
+		dev_err(&pdev->dev, "Register mailbox failed\n");
+		goto err;
+	}
+
+	platform_set_drvdata(pdev, mbox);
+err:
+	return ret;
+}
+
+static int altera_mbox_remove(struct platform_device *pdev)
+{
+	struct altera_mbox *mbox = platform_get_drvdata(pdev);
+
+	if (!mbox)
+		return -EINVAL;
+
+	mbox_controller_unregister(&mbox->controller);
+
+	return 0;
+}
+
+static const struct of_device_id altera_mbox_match[] = {
+	{ .compatible = "altr,mailbox-1.0" },
+	{ /* Sentinel */ }
+};
+
+MODULE_DEVICE_TABLE(of, altera_mbox_match);
+
+static struct platform_driver altera_mbox_driver = {
+	.probe	= altera_mbox_probe,
+	.remove	= altera_mbox_remove,
+	.driver	= {
+		.name	= DRIVER_NAME,
+		.of_match_table	= altera_mbox_match,
+	},
+};
+
+module_platform_driver(altera_mbox_driver);
+
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("Altera mailbox specific functions");
+MODULE_AUTHOR("Ley Foon Tan <lftan@altera.com>");
+MODULE_ALIAS("platform:altera-mailbox");
diff --git a/linux/drivers/mailbox/mailbox.c b/linux/drivers/mailbox/mailbox.c
new file mode 100644
index 00000000..c7fdb57f
--- /dev/null
+++ b/linux/drivers/mailbox/mailbox.c
@@ -0,0 +1,502 @@
+/*
+ * Mailbox: Common code for Mailbox controllers and users
+ *
+ * Copyright (C) 2013-2014 Linaro Ltd.
+ * Author: Jassi Brar <jassisinghbrar@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/interrupt.h>
+#include <linux/spinlock.h>
+#include <linux/mutex.h>
+#include <linux/delay.h>
+#include <linux/slab.h>
+#include <linux/err.h>
+#include <linux/module.h>
+#include <linux/device.h>
+#include <linux/bitops.h>
+#include <linux/mailbox_client.h>
+#include <linux/mailbox_controller.h>
+
+#include "mailbox.h"
+
+static LIST_HEAD(mbox_cons);
+static DEFINE_MUTEX(con_mutex);
+
+static void poll_txdone(unsigned long data);
+
+static int add_to_rbuf(struct mbox_chan *chan, void *mssg)
+{
+	int idx;
+	unsigned long flags;
+
+	spin_lock_irqsave(&chan->lock, flags);
+
+	/* See if there is any space left */
+	if (chan->msg_count == MBOX_TX_QUEUE_LEN) {
+		spin_unlock_irqrestore(&chan->lock, flags);
+		return -ENOBUFS;
+	}
+
+	idx = chan->msg_free;
+	chan->msg_data[idx] = mssg;
+	chan->msg_count++;
+
+	if (idx == MBOX_TX_QUEUE_LEN - 1)
+		chan->msg_free = 0;
+	else
+		chan->msg_free++;
+
+	spin_unlock_irqrestore(&chan->lock, flags);
+
+	return idx;
+}
+
+static void msg_submit(struct mbox_chan *chan)
+{
+	unsigned count, idx;
+	unsigned long flags;
+	void *data;
+	int err = -EBUSY;
+
+	spin_lock_irqsave(&chan->lock, flags);
+
+	if (!chan->msg_count || chan->active_req)
+		goto exit;
+
+	count = chan->msg_count;
+	idx = chan->msg_free;
+	if (idx >= count)
+		idx -= count;
+	else
+		idx += MBOX_TX_QUEUE_LEN - count;
+
+	data = chan->msg_data[idx];
+
+	if (chan->cl->tx_prepare)
+		chan->cl->tx_prepare(chan->cl, data);
+	/* Try to submit a message to the MBOX controller */
+	err = chan->mbox->ops->send_data(chan, data);
+	if (!err) {
+		chan->active_req = data;
+		chan->msg_count--;
+	}
+exit:
+	spin_unlock_irqrestore(&chan->lock, flags);
+
+	if (!err && (chan->txdone_method & TXDONE_BY_POLL))
+		poll_txdone((unsigned long)chan->mbox);
+}
+
+static void tx_tick(struct mbox_chan *chan, int r)
+{
+	unsigned long flags;
+	void *mssg;
+
+	spin_lock_irqsave(&chan->lock, flags);
+	mssg = chan->active_req;
+	chan->active_req = NULL;
+	spin_unlock_irqrestore(&chan->lock, flags);
+
+	/* Submit next message */
+	msg_submit(chan);
+
+	/* Notify the client */
+	if (mssg && chan->cl->tx_done)
+		chan->cl->tx_done(chan->cl, mssg, r);
+
+	if (chan->cl->tx_block)
+		complete(&chan->tx_complete);
+}
+
+static void poll_txdone(unsigned long data)
+{
+	struct mbox_controller *mbox = (struct mbox_controller *)data;
+	bool txdone, resched = false;
+	int i;
+
+	for (i = 0; i < mbox->num_chans; i++) {
+		struct mbox_chan *chan = &mbox->chans[i];
+
+		if (chan->active_req && chan->cl) {
+			txdone = chan->mbox->ops->last_tx_done(chan);
+			if (txdone)
+				tx_tick(chan, 0);
+			else
+				resched = true;
+		}
+	}
+
+	if (resched)
+		mod_timer(&mbox->poll, jiffies +
+				msecs_to_jiffies(mbox->txpoll_period));
+}
+
+/**
+ * mbox_chan_received_data - A way for controller driver to push data
+ *				received from remote to the upper layer.
+ * @chan: Pointer to the mailbox channel on which RX happened.
+ * @mssg: Client specific message typecasted as void *
+ *
+ * After startup and before shutdown any data received on the chan
+ * is passed on to the API via atomic mbox_chan_received_data().
+ * The controller should ACK the RX only after this call returns.
+ */
+void mbox_chan_received_data(struct mbox_chan *chan, void *mssg)
+{
+	/* No buffering the received data */
+	if (chan->cl->rx_callback)
+		chan->cl->rx_callback(chan->cl, mssg);
+}
+EXPORT_SYMBOL_GPL(mbox_chan_received_data);
+
+/**
+ * mbox_chan_txdone - A way for controller driver to notify the
+ *			framework that the last TX has completed.
+ * @chan: Pointer to the mailbox chan on which TX happened.
+ * @r: Status of last TX - OK or ERROR
+ *
+ * The controller that has IRQ for TX ACK calls this atomic API
+ * to tick the TX state machine. It works only if txdone_irq
+ * is set by the controller.
+ */
+void mbox_chan_txdone(struct mbox_chan *chan, int r)
+{
+	if (unlikely(!(chan->txdone_method & TXDONE_BY_IRQ))) {
+		dev_err(chan->mbox->dev,
+		       "Controller can't run the TX ticker\n");
+		return;
+	}
+
+	tx_tick(chan, r);
+}
+EXPORT_SYMBOL_GPL(mbox_chan_txdone);
+
+/**
+ * mbox_client_txdone - The way for a client to run the TX state machine.
+ * @chan: Mailbox channel assigned to this client.
+ * @r: Success status of last transmission.
+ *
+ * The client/protocol had received some 'ACK' packet and it notifies
+ * the API that the last packet was sent successfully. This only works
+ * if the controller can't sense TX-Done.
+ */
+void mbox_client_txdone(struct mbox_chan *chan, int r)
+{
+	if (unlikely(!(chan->txdone_method & TXDONE_BY_ACK))) {
+		dev_err(chan->mbox->dev, "Client can't run the TX ticker\n");
+		return;
+	}
+
+	tx_tick(chan, r);
+}
+EXPORT_SYMBOL_GPL(mbox_client_txdone);
+
+/**
+ * mbox_client_peek_data - A way for client driver to pull data
+ *			received from remote by the controller.
+ * @chan: Mailbox channel assigned to this client.
+ *
+ * A poke to controller driver for any received data.
+ * The data is actually passed onto client via the
+ * mbox_chan_received_data()
+ * The call can be made from atomic context, so the controller's
+ * implementation of peek_data() must not sleep.
+ *
+ * Return: True, if controller has, and is going to push after this,
+ *          some data.
+ *         False, if controller doesn't have any data to be read.
+ */
+bool mbox_client_peek_data(struct mbox_chan *chan)
+{
+	if (chan->mbox->ops->peek_data)
+		return chan->mbox->ops->peek_data(chan);
+
+	return false;
+}
+EXPORT_SYMBOL_GPL(mbox_client_peek_data);
+
+/**
+ * mbox_send_message -	For client to submit a message to be
+ *				sent to the remote.
+ * @chan: Mailbox channel assigned to this client.
+ * @mssg: Client specific message typecasted.
+ *
+ * For client to submit data to the controller destined for a remote
+ * processor. If the client had set 'tx_block', the call will return
+ * either when the remote receives the data or when 'tx_tout' millisecs
+ * run out.
+ *  In non-blocking mode, the requests are buffered by the API and a
+ * non-negative token is returned for each queued request. If the request
+ * is not queued, a negative token is returned. Upon failure or successful
+ * TX, the API calls 'tx_done' from atomic context, from which the client
+ * could submit yet another request.
+ * The pointer to message should be preserved until it is sent
+ * over the chan, i.e, tx_done() is made.
+ * This function could be called from atomic context as it simply
+ * queues the data and returns a token against the request.
+ *
+ * Return: Non-negative integer for successful submission (non-blocking mode)
+ *	or transmission over chan (blocking mode).
+ *	Negative value denotes failure.
+ */
+int mbox_send_message(struct mbox_chan *chan, void *mssg)
+{
+	int t;
+
+	if (!chan || !chan->cl)
+		return -EINVAL;
+
+	t = add_to_rbuf(chan, mssg);
+	if (t < 0) {
+		dev_err(chan->mbox->dev, "Try increasing MBOX_TX_QUEUE_LEN\n");
+		return t;
+	}
+
+	msg_submit(chan);
+
+	if (chan->cl->tx_block && chan->active_req) {
+		unsigned long wait;
+		int ret;
+
+		if (!chan->cl->tx_tout) /* wait forever */
+			wait = msecs_to_jiffies(3600000);
+		else
+			wait = msecs_to_jiffies(chan->cl->tx_tout);
+
+		ret = wait_for_completion_timeout(&chan->tx_complete, wait);
+		if (ret == 0) {
+			t = -EIO;
+			tx_tick(chan, -EIO);
+		}
+	}
+
+	return t;
+}
+EXPORT_SYMBOL_GPL(mbox_send_message);
+
+/**
+ * mbox_request_channel - Request a mailbox channel.
+ * @cl: Identity of the client requesting the channel.
+ * @index: Index of mailbox specifier in 'mboxes' property.
+ *
+ * The Client specifies its requirements and capabilities while asking for
+ * a mailbox channel. It can't be called from atomic context.
+ * The channel is exclusively allocated and can't be used by another
+ * client before the owner calls mbox_free_channel.
+ * After assignment, any packet received on this channel will be
+ * handed over to the client via the 'rx_callback'.
+ * The framework holds reference to the client, so the mbox_client
+ * structure shouldn't be modified until the mbox_free_channel returns.
+ *
+ * Return: Pointer to the channel assigned to the client if successful.
+ *		ERR_PTR for request failure.
+ */
+struct mbox_chan *mbox_request_channel(struct mbox_client *cl, int index)
+{
+	struct device *dev = cl->dev;
+	struct mbox_controller *mbox;
+	struct of_phandle_args spec;
+	struct mbox_chan *chan;
+	unsigned long flags;
+	int ret;
+
+	if (!dev || !dev->of_node) {
+		pr_debug("%s: No owner device node\n", __func__);
+		return ERR_PTR(-ENODEV);
+	}
+
+	mutex_lock(&con_mutex);
+
+	if (of_parse_phandle_with_args(dev->of_node, "mboxes",
+				       "#mbox-cells", index, &spec)) {
+		dev_dbg(dev, "%s: can't parse \"mboxes\" property\n", __func__);
+		mutex_unlock(&con_mutex);
+		return ERR_PTR(-ENODEV);
+	}
+
+	chan = ERR_PTR(-EPROBE_DEFER);
+	list_for_each_entry(mbox, &mbox_cons, node)
+		if (mbox->dev->of_node == spec.np) {
+			chan = mbox->of_xlate(mbox, &spec);
+			break;
+		}
+
+	of_node_put(spec.np);
+
+	if (IS_ERR(chan)) {
+		mutex_unlock(&con_mutex);
+		return chan;
+	}
+
+	if (chan->cl || !try_module_get(mbox->dev->driver->owner)) {
+		dev_dbg(dev, "%s: mailbox not free\n", __func__);
+		mutex_unlock(&con_mutex);
+		return ERR_PTR(-EBUSY);
+	}
+
+	spin_lock_irqsave(&chan->lock, flags);
+	chan->msg_free = 0;
+	chan->msg_count = 0;
+	chan->active_req = NULL;
+	chan->cl = cl;
+	init_completion(&chan->tx_complete);
+
+	if (chan->txdone_method	== TXDONE_BY_POLL && cl->knows_txdone)
+		chan->txdone_method |= TXDONE_BY_ACK;
+
+	spin_unlock_irqrestore(&chan->lock, flags);
+
+	ret = chan->mbox->ops->startup(chan);
+	if (ret) {
+		dev_err(dev, "Unable to startup the chan (%d)\n", ret);
+		mbox_free_channel(chan);
+		chan = ERR_PTR(ret);
+	}
+
+	mutex_unlock(&con_mutex);
+	return chan;
+}
+EXPORT_SYMBOL_GPL(mbox_request_channel);
+
+struct mbox_chan *mbox_request_channel_byname(struct mbox_client *cl,
+					      const char *name)
+{
+	struct device_node *np = cl->dev->of_node;
+	struct property *prop;
+	const char *mbox_name;
+	int index = 0;
+
+	if (!np) {
+		dev_err(cl->dev, "%s() currently only supports DT\n", __func__);
+		return ERR_PTR(-ENOSYS);
+	}
+
+	if (!of_get_property(np, "mbox-names", NULL)) {
+		dev_err(cl->dev,
+			"%s() requires an \"mbox-names\" property\n", __func__);
+		return ERR_PTR(-ENOSYS);
+	}
+
+	of_property_for_each_string(np, "mbox-names", prop, mbox_name) {
+		if (!strncmp(name, mbox_name, strlen(name)))
+			break;
+		index++;
+	}
+
+	return mbox_request_channel(cl, index);
+}
+EXPORT_SYMBOL_GPL(mbox_request_channel_byname);
+
+/**
+ * mbox_free_channel - The client relinquishes control of a mailbox
+ *			channel by this call.
+ * @chan: The mailbox channel to be freed.
+ */
+void mbox_free_channel(struct mbox_chan *chan)
+{
+	unsigned long flags;
+
+	if (!chan || !chan->cl)
+		return;
+
+	chan->mbox->ops->shutdown(chan);
+
+	/* The queued TX requests are simply aborted, no callbacks are made */
+	spin_lock_irqsave(&chan->lock, flags);
+	chan->cl = NULL;
+	chan->active_req = NULL;
+	if (chan->txdone_method == (TXDONE_BY_POLL | TXDONE_BY_ACK))
+		chan->txdone_method = TXDONE_BY_POLL;
+
+	module_put(chan->mbox->dev->driver->owner);
+	spin_unlock_irqrestore(&chan->lock, flags);
+}
+EXPORT_SYMBOL_GPL(mbox_free_channel);
+
+static struct mbox_chan *
+of_mbox_index_xlate(struct mbox_controller *mbox,
+		    const struct of_phandle_args *sp)
+{
+	int ind = sp->args[0];
+
+	if (ind >= mbox->num_chans)
+		return ERR_PTR(-EINVAL);
+
+	return &mbox->chans[ind];
+}
+
+/**
+ * mbox_controller_register - Register the mailbox controller
+ * @mbox:	Pointer to the mailbox controller.
+ *
+ * The controller driver registers its communication channels
+ */
+int mbox_controller_register(struct mbox_controller *mbox)
+{
+	int i, txdone;
+
+	/* Sanity check */
+	if (!mbox || !mbox->dev || !mbox->ops || !mbox->num_chans)
+		return -EINVAL;
+
+	if (mbox->txdone_irq)
+		txdone = TXDONE_BY_IRQ;
+	else if (mbox->txdone_poll)
+		txdone = TXDONE_BY_POLL;
+	else /* It has to be ACK then */
+		txdone = TXDONE_BY_ACK;
+
+	if (txdone == TXDONE_BY_POLL) {
+		mbox->poll.function = &poll_txdone;
+		mbox->poll.data = (unsigned long)mbox;
+		init_timer(&mbox->poll);
+	}
+
+	for (i = 0; i < mbox->num_chans; i++) {
+		struct mbox_chan *chan = &mbox->chans[i];
+
+		chan->cl = NULL;
+		chan->mbox = mbox;
+		chan->txdone_method = txdone;
+		spin_lock_init(&chan->lock);
+	}
+
+	if (!mbox->of_xlate)
+		mbox->of_xlate = of_mbox_index_xlate;
+
+	mutex_lock(&con_mutex);
+	list_add_tail(&mbox->node, &mbox_cons);
+	mutex_unlock(&con_mutex);
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(mbox_controller_register);
+
+/**
+ * mbox_controller_unregister - Unregister the mailbox controller
+ * @mbox:	Pointer to the mailbox controller.
+ */
+void mbox_controller_unregister(struct mbox_controller *mbox)
+{
+	int i;
+
+	if (!mbox)
+		return;
+
+	mutex_lock(&con_mutex);
+
+	list_del(&mbox->node);
+
+	for (i = 0; i < mbox->num_chans; i++)
+		mbox_free_channel(&mbox->chans[i]);
+
+	if (mbox->txdone_poll)
+		del_timer_sync(&mbox->poll);
+
+	mutex_unlock(&con_mutex);
+}
+EXPORT_SYMBOL_GPL(mbox_controller_unregister);
diff --git a/linux/drivers/mailbox/mailbox.h b/linux/drivers/mailbox/mailbox.h
new file mode 100644
index 00000000..456ba685
--- /dev/null
+++ b/linux/drivers/mailbox/mailbox.h
@@ -0,0 +1,14 @@
+/*
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef __MAILBOX_H
+#define __MAILBOX_H
+
+#define TXDONE_BY_IRQ	BIT(0) /* controller has remote RTR irq */
+#define TXDONE_BY_POLL	BIT(1) /* controller can read status of last TX */
+#define TXDONE_BY_ACK	BIT(2) /* S/W ACK recevied by Client ticks the TX */
+
+#endif /* __MAILBOX_H */
diff --git a/linux/drivers/mailbox/mailbox.o b/linux/drivers/mailbox/mailbox.o
new file mode 100644
index 00000000..5b4c92a6
--- /dev/null
+++ b/linux/drivers/mailbox/mailbox.o
diff --git a/linux/drivers/mailbox/modules.builtin b/linux/drivers/mailbox/modules.builtin
new file mode 100644
index 00000000..be67126f
--- /dev/null
+++ b/linux/drivers/mailbox/modules.builtin
@@ -0,0 +1 @@
+kernel/drivers/mailbox/omap-mailbox.ko
diff --git a/linux/drivers/mailbox/modules.order b/linux/drivers/mailbox/modules.order
new file mode 100644
index 00000000..e69de29b
--- /dev/null
+++ b/linux/drivers/mailbox/modules.order
diff --git a/linux/drivers/mailbox/omap-mailbox.c b/linux/drivers/mailbox/omap-mailbox.c
new file mode 100644
index 00000000..b7f636f1
--- /dev/null
+++ b/linux/drivers/mailbox/omap-mailbox.c
@@ -0,0 +1,939 @@
+/*
+ * OMAP mailbox driver
+ *
+ * Copyright (C) 2006-2009 Nokia Corporation. All rights reserved.
+ * Copyright (C) 2013-2014 Texas Instruments Inc.
+ *
+ * Contact: Hiroshi DOYU <Hiroshi.DOYU@nokia.com>
+ *          Suman Anna <s-anna@ti.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+ * 02110-1301 USA
+ *
+ */
+
+#include <linux/interrupt.h>
+#include <linux/spinlock.h>
+#include <linux/mutex.h>
+#include <linux/slab.h>
+#include <linux/kfifo.h>
+#include <linux/err.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/platform_data/mailbox-omap.h>
+#include <linux/omap-mailbox.h>
+#include <linux/mailbox_controller.h>
+#include <linux/mailbox_client.h>
+
+#include "mailbox.h"
+
+#define MAILBOX_REVISION		0x000
+#define MAILBOX_MESSAGE(m)		(0x040 + 4 * (m))
+#define MAILBOX_FIFOSTATUS(m)		(0x080 + 4 * (m))
+#define MAILBOX_MSGSTATUS(m)		(0x0c0 + 4 * (m))
+
+#define OMAP2_MAILBOX_IRQSTATUS(u)	(0x100 + 8 * (u))
+#define OMAP2_MAILBOX_IRQENABLE(u)	(0x104 + 8 * (u))
+
+#define OMAP4_MAILBOX_IRQSTATUS(u)	(0x104 + 0x10 * (u))
+#define OMAP4_MAILBOX_IRQENABLE(u)	(0x108 + 0x10 * (u))
+#define OMAP4_MAILBOX_IRQENABLE_CLR(u)	(0x10c + 0x10 * (u))
+
+#define MAILBOX_IRQSTATUS(type, u)	(type ? OMAP4_MAILBOX_IRQSTATUS(u) : \
+						OMAP2_MAILBOX_IRQSTATUS(u))
+#define MAILBOX_IRQENABLE(type, u)	(type ? OMAP4_MAILBOX_IRQENABLE(u) : \
+						OMAP2_MAILBOX_IRQENABLE(u))
+#define MAILBOX_IRQDISABLE(type, u)	(type ? OMAP4_MAILBOX_IRQENABLE_CLR(u) \
+						: OMAP2_MAILBOX_IRQENABLE(u))
+
+#define MAILBOX_IRQ_NEWMSG(m)		(1 << (2 * (m)))
+#define MAILBOX_IRQ_NOTFULL(m)		(1 << (2 * (m) + 1))
+
+#define MBOX_REG_SIZE			0x120
+
+#define OMAP4_MBOX_REG_SIZE		0x130
+
+#define MBOX_NR_REGS			(MBOX_REG_SIZE / sizeof(u32))
+#define OMAP4_MBOX_NR_REGS		(OMAP4_MBOX_REG_SIZE / sizeof(u32))
+
+struct omap_mbox_fifo {
+	unsigned long msg;
+	unsigned long fifo_stat;
+	unsigned long msg_stat;
+	unsigned long irqenable;
+	unsigned long irqstatus;
+	unsigned long irqdisable;
+	u32 intr_bit;
+};
+
+struct omap_mbox_queue {
+	spinlock_t		lock;
+	struct kfifo		fifo;
+	struct work_struct	work;
+	struct omap_mbox	*mbox;
+	bool full;
+};
+
+struct omap_mbox_device {
+	struct device *dev;
+	struct mutex cfg_lock;
+	void __iomem *mbox_base;
+	u32 num_users;
+	u32 num_fifos;
+	struct omap_mbox **mboxes;
+	struct mbox_controller controller;
+	struct list_head elem;
+};
+
+struct omap_mbox_fifo_info {
+	int tx_id;
+	int tx_usr;
+	int tx_irq;
+
+	int rx_id;
+	int rx_usr;
+	int rx_irq;
+
+	const char *name;
+	bool send_no_irq;
+};
+
+struct omap_mbox {
+	const char		*name;
+	int			irq;
+	struct omap_mbox_queue	*rxq;
+	struct device		*dev;
+	struct omap_mbox_device *parent;
+	struct omap_mbox_fifo	tx_fifo;
+	struct omap_mbox_fifo	rx_fifo;
+	u32			ctx[OMAP4_MBOX_NR_REGS];
+	u32			intr_type;
+	struct mbox_chan	*chan;
+	bool			send_no_irq;
+};
+
+/* global variables for the mailbox devices */
+static DEFINE_MUTEX(omap_mbox_devices_lock);
+static LIST_HEAD(omap_mbox_devices);
+
+static unsigned int mbox_kfifo_size = CONFIG_OMAP_MBOX_KFIFO_SIZE;
+module_param(mbox_kfifo_size, uint, S_IRUGO);
+MODULE_PARM_DESC(mbox_kfifo_size, "Size of omap's mailbox kfifo (bytes)");
+
+static struct omap_mbox *mbox_chan_to_omap_mbox(struct mbox_chan *chan)
+{
+	if (!chan || !chan->con_priv)
+		return NULL;
+
+	return (struct omap_mbox *)chan->con_priv;
+}
+
+static inline
+unsigned int mbox_read_reg(struct omap_mbox_device *mdev, size_t ofs)
+{
+	return __raw_readl(mdev->mbox_base + ofs);
+}
+
+static inline
+void mbox_write_reg(struct omap_mbox_device *mdev, u32 val, size_t ofs)
+{
+	__raw_writel(val, mdev->mbox_base + ofs);
+}
+
+/* Mailbox FIFO handle functions */
+static mbox_msg_t mbox_fifo_read(struct omap_mbox *mbox)
+{
+	struct omap_mbox_fifo *fifo = &mbox->rx_fifo;
+	return (mbox_msg_t) mbox_read_reg(mbox->parent, fifo->msg);
+}
+
+static void mbox_fifo_write(struct omap_mbox *mbox, mbox_msg_t msg)
+{
+	struct omap_mbox_fifo *fifo = &mbox->tx_fifo;
+	mbox_write_reg(mbox->parent, msg, fifo->msg);
+}
+
+static int mbox_fifo_empty(struct omap_mbox *mbox)
+{
+	struct omap_mbox_fifo *fifo = &mbox->rx_fifo;
+	return (mbox_read_reg(mbox->parent, fifo->msg_stat) == 0);
+}
+
+static int mbox_fifo_full(struct omap_mbox *mbox)
+{
+	struct omap_mbox_fifo *fifo = &mbox->tx_fifo;
+	return mbox_read_reg(mbox->parent, fifo->fifo_stat);
+}
+
+/* Mailbox IRQ handle functions */
+static void ack_mbox_irq(struct omap_mbox *mbox, omap_mbox_irq_t irq)
+{
+	struct omap_mbox_fifo *fifo = (irq == IRQ_TX) ?
+				&mbox->tx_fifo : &mbox->rx_fifo;
+	u32 bit = fifo->intr_bit;
+	u32 irqstatus = fifo->irqstatus;
+
+	mbox_write_reg(mbox->parent, bit, irqstatus);
+
+	/* Flush posted write for irq status to avoid spurious interrupts */
+	mbox_read_reg(mbox->parent, irqstatus);
+}
+
+static int is_mbox_irq(struct omap_mbox *mbox, omap_mbox_irq_t irq)
+{
+	struct omap_mbox_fifo *fifo = (irq == IRQ_TX) ?
+				&mbox->tx_fifo : &mbox->rx_fifo;
+	u32 bit = fifo->intr_bit;
+	u32 irqenable = fifo->irqenable;
+	u32 irqstatus = fifo->irqstatus;
+
+	u32 enable = mbox_read_reg(mbox->parent, irqenable);
+	u32 status = mbox_read_reg(mbox->parent, irqstatus);
+
+	return (int)(enable & status & bit);
+}
+
+void omap_mbox_save_ctx(struct mbox_chan *chan)
+{
+	int i;
+	int nr_regs;
+	struct omap_mbox *mbox = mbox_chan_to_omap_mbox(chan);
+
+	if (WARN_ON(!mbox))
+		return;
+
+	if (mbox->intr_type)
+		nr_regs = OMAP4_MBOX_NR_REGS;
+	else
+		nr_regs = MBOX_NR_REGS;
+	for (i = 0; i < nr_regs; i++) {
+		mbox->ctx[i] = mbox_read_reg(mbox->parent, i * sizeof(u32));
+
+		dev_dbg(mbox->dev, "%s: [%02x] %08x\n", __func__,
+			i, mbox->ctx[i]);
+	}
+}
+EXPORT_SYMBOL(omap_mbox_save_ctx);
+
+void omap_mbox_restore_ctx(struct mbox_chan *chan)
+{
+	int i;
+	int nr_regs;
+	struct omap_mbox *mbox = mbox_chan_to_omap_mbox(chan);
+
+	if (WARN_ON(!mbox))
+		return;
+
+	if (mbox->intr_type)
+		nr_regs = OMAP4_MBOX_NR_REGS;
+	else
+		nr_regs = MBOX_NR_REGS;
+	for (i = 0; i < nr_regs; i++) {
+		mbox_write_reg(mbox->parent, mbox->ctx[i], i * sizeof(u32));
+		dev_dbg(mbox->dev, "%s: [%02x] %08x\n", __func__,
+			i, mbox->ctx[i]);
+	}
+}
+EXPORT_SYMBOL(omap_mbox_restore_ctx);
+
+static void _omap_mbox_enable_irq(struct omap_mbox *mbox, omap_mbox_irq_t irq)
+{
+	u32 l;
+	struct omap_mbox_fifo *fifo = (irq == IRQ_TX) ?
+				&mbox->tx_fifo : &mbox->rx_fifo;
+	u32 bit = fifo->intr_bit;
+	u32 irqenable = fifo->irqenable;
+
+	l = mbox_read_reg(mbox->parent, irqenable);
+	l |= bit;
+	mbox_write_reg(mbox->parent, l, irqenable);
+}
+
+static void _omap_mbox_disable_irq(struct omap_mbox *mbox, omap_mbox_irq_t irq)
+{
+	struct omap_mbox_fifo *fifo = (irq == IRQ_TX) ?
+				&mbox->tx_fifo : &mbox->rx_fifo;
+	u32 bit = fifo->intr_bit;
+	u32 irqdisable = fifo->irqdisable;
+
+	/*
+	 * Read and update the interrupt configuration register for pre-OMAP4.
+	 * OMAP4 and later SoCs have a dedicated interrupt disabling register.
+	 */
+	if (!mbox->intr_type)
+		bit = mbox_read_reg(mbox->parent, irqdisable) & ~bit;
+
+	mbox_write_reg(mbox->parent, bit, irqdisable);
+}
+
+void omap_mbox_enable_irq(struct mbox_chan *chan, omap_mbox_irq_t irq)
+{
+	struct omap_mbox *mbox = mbox_chan_to_omap_mbox(chan);
+
+	if (WARN_ON(!mbox))
+		return;
+
+	_omap_mbox_enable_irq(mbox, irq);
+}
+EXPORT_SYMBOL(omap_mbox_enable_irq);
+
+void omap_mbox_disable_irq(struct mbox_chan *chan, omap_mbox_irq_t irq)
+{
+	struct omap_mbox *mbox = mbox_chan_to_omap_mbox(chan);
+
+	if (WARN_ON(!mbox))
+		return;
+
+	_omap_mbox_disable_irq(mbox, irq);
+}
+EXPORT_SYMBOL(omap_mbox_disable_irq);
+
+/*
+ * Message receiver(workqueue)
+ */
+static void mbox_rx_work(struct work_struct *work)
+{
+	struct omap_mbox_queue *mq =
+			container_of(work, struct omap_mbox_queue, work);
+	mbox_msg_t msg;
+	int len;
+
+	while (kfifo_len(&mq->fifo) >= sizeof(msg)) {
+		len = kfifo_out(&mq->fifo, (unsigned char *)&msg, sizeof(msg));
+		WARN_ON(len != sizeof(msg));
+
+		mbox_chan_received_data(mq->mbox->chan, (void *)msg);
+		spin_lock_irq(&mq->lock);
+		if (mq->full) {
+			mq->full = false;
+			_omap_mbox_enable_irq(mq->mbox, IRQ_RX);
+		}
+		spin_unlock_irq(&mq->lock);
+	}
+}
+
+/*
+ * Mailbox interrupt handler
+ */
+static void __mbox_tx_interrupt(struct omap_mbox *mbox)
+{
+	_omap_mbox_disable_irq(mbox, IRQ_TX);
+	ack_mbox_irq(mbox, IRQ_TX);
+	mbox_chan_txdone(mbox->chan, 0);
+}
+
+static void __mbox_rx_interrupt(struct omap_mbox *mbox)
+{
+	struct omap_mbox_queue *mq = mbox->rxq;
+	mbox_msg_t msg;
+	int len;
+
+	while (!mbox_fifo_empty(mbox)) {
+		if (unlikely(kfifo_avail(&mq->fifo) < sizeof(msg))) {
+			_omap_mbox_disable_irq(mbox, IRQ_RX);
+			mq->full = true;
+			goto nomem;
+		}
+
+		msg = mbox_fifo_read(mbox);
+
+		len = kfifo_in(&mq->fifo, (unsigned char *)&msg, sizeof(msg));
+		WARN_ON(len != sizeof(msg));
+	}
+
+	/* no more messages in the fifo. clear IRQ source. */
+	ack_mbox_irq(mbox, IRQ_RX);
+nomem:
+	schedule_work(&mbox->rxq->work);
+}
+
+static irqreturn_t mbox_interrupt(int irq, void *p)
+{
+	struct omap_mbox *mbox = p;
+
+	if (is_mbox_irq(mbox, IRQ_TX))
+		__mbox_tx_interrupt(mbox);
+
+	if (is_mbox_irq(mbox, IRQ_RX))
+		__mbox_rx_interrupt(mbox);
+
+	return IRQ_HANDLED;
+}
+
+static struct omap_mbox_queue *mbox_queue_alloc(struct omap_mbox *mbox,
+					void (*work)(struct work_struct *))
+{
+	struct omap_mbox_queue *mq;
+
+	if (!work)
+		return NULL;
+
+	mq = kzalloc(sizeof(struct omap_mbox_queue), GFP_KERNEL);
+	if (!mq)
+		return NULL;
+
+	spin_lock_init(&mq->lock);
+
+	if (kfifo_alloc(&mq->fifo, mbox_kfifo_size, GFP_KERNEL))
+		goto error;
+
+	INIT_WORK(&mq->work, work);
+	return mq;
+
+error:
+	kfree(mq);
+	return NULL;
+}
+
+static void mbox_queue_free(struct omap_mbox_queue *q)
+{
+	kfifo_free(&q->fifo);
+	kfree(q);
+}
+
+static int omap_mbox_startup(struct omap_mbox *mbox)
+{
+	int ret = 0;
+	struct omap_mbox_queue *mq;
+
+	mq = mbox_queue_alloc(mbox, mbox_rx_work);
+	if (!mq)
+		return -ENOMEM;
+	mbox->rxq = mq;
+	mq->mbox = mbox;
+
+	ret = request_irq(mbox->irq, mbox_interrupt, IRQF_SHARED,
+			  mbox->name, mbox);
+	if (unlikely(ret)) {
+		pr_err("failed to register mailbox interrupt:%d\n", ret);
+		goto fail_request_irq;
+	}
+
+	if (mbox->send_no_irq)
+		mbox->chan->txdone_method = TXDONE_BY_ACK;
+
+	_omap_mbox_enable_irq(mbox, IRQ_RX);
+
+	return 0;
+
+fail_request_irq:
+	mbox_queue_free(mbox->rxq);
+	return ret;
+}
+
+static void omap_mbox_fini(struct omap_mbox *mbox)
+{
+	_omap_mbox_disable_irq(mbox, IRQ_RX);
+	free_irq(mbox->irq, mbox);
+	flush_work(&mbox->rxq->work);
+	mbox_queue_free(mbox->rxq);
+}
+
+static struct omap_mbox *omap_mbox_device_find(struct omap_mbox_device *mdev,
+					       const char *mbox_name)
+{
+	struct omap_mbox *_mbox, *mbox = NULL;
+	struct omap_mbox **mboxes = mdev->mboxes;
+	int i;
+
+	if (!mboxes)
+		return NULL;
+
+	for (i = 0; (_mbox = mboxes[i]); i++) {
+		if (!strcmp(_mbox->name, mbox_name)) {
+			mbox = _mbox;
+			break;
+		}
+	}
+	return mbox;
+}
+
+struct mbox_chan *omap_mbox_request_channel(struct mbox_client *cl,
+					    const char *chan_name)
+{
+	struct device *dev = cl->dev;
+	struct omap_mbox *mbox = NULL;
+	struct omap_mbox_device *mdev;
+	struct mbox_chan *chan;
+	unsigned long flags;
+	int ret;
+
+	if (!dev)
+		return ERR_PTR(-ENODEV);
+
+	if (dev->of_node) {
+		pr_err("%s: please use mbox_request_channel(), this API is supported only for OMAP non-DT usage\n",
+		       __func__);
+		return ERR_PTR(-ENODEV);
+	}
+
+	mutex_lock(&omap_mbox_devices_lock);
+	list_for_each_entry(mdev, &omap_mbox_devices, elem) {
+		mbox = omap_mbox_device_find(mdev, chan_name);
+		if (mbox)
+			break;
+	}
+	mutex_unlock(&omap_mbox_devices_lock);
+
+	if (!mbox || !mbox->chan)
+		return ERR_PTR(-ENOENT);
+
+	chan = mbox->chan;
+	spin_lock_irqsave(&chan->lock, flags);
+	chan->msg_free = 0;
+	chan->msg_count = 0;
+	chan->active_req = NULL;
+	chan->cl = cl;
+	init_completion(&chan->tx_complete);
+	spin_unlock_irqrestore(&chan->lock, flags);
+
+	ret = chan->mbox->ops->startup(chan);
+	if (ret) {
+		pr_err("Unable to startup the chan (%d)\n", ret);
+		mbox_free_channel(chan);
+		chan = ERR_PTR(ret);
+	}
+
+	return chan;
+}
+EXPORT_SYMBOL(omap_mbox_request_channel);
+
+static struct class omap_mbox_class = { .name = "mbox", };
+
+static int omap_mbox_register(struct omap_mbox_device *mdev)
+{
+	int ret;
+	int i;
+	struct omap_mbox **mboxes;
+
+	if (!mdev || !mdev->mboxes)
+		return -EINVAL;
+
+	mboxes = mdev->mboxes;
+	for (i = 0; mboxes[i]; i++) {
+		struct omap_mbox *mbox = mboxes[i];
+		mbox->dev = device_create(&omap_mbox_class, mdev->dev,
+					0, mbox, "%s", mbox->name);
+		if (IS_ERR(mbox->dev)) {
+			ret = PTR_ERR(mbox->dev);
+			goto err_out;
+		}
+	}
+
+	mutex_lock(&omap_mbox_devices_lock);
+	list_add(&mdev->elem, &omap_mbox_devices);
+	mutex_unlock(&omap_mbox_devices_lock);
+
+	ret = mbox_controller_register(&mdev->controller);
+
+err_out:
+	if (ret) {
+		while (i--)
+			device_unregister(mboxes[i]->dev);
+	}
+	return ret;
+}
+
+static int omap_mbox_unregister(struct omap_mbox_device *mdev)
+{
+	int i;
+	struct omap_mbox **mboxes;
+
+	if (!mdev || !mdev->mboxes)
+		return -EINVAL;
+
+	mutex_lock(&omap_mbox_devices_lock);
+	list_del(&mdev->elem);
+	mutex_unlock(&omap_mbox_devices_lock);
+
+	mbox_controller_unregister(&mdev->controller);
+
+	mboxes = mdev->mboxes;
+	for (i = 0; mboxes[i]; i++)
+		device_unregister(mboxes[i]->dev);
+	return 0;
+}
+
+static int omap_mbox_chan_startup(struct mbox_chan *chan)
+{
+	struct omap_mbox *mbox = mbox_chan_to_omap_mbox(chan);
+	struct omap_mbox_device *mdev = mbox->parent;
+	int ret = 0;
+
+	mutex_lock(&mdev->cfg_lock);
+	pm_runtime_get_sync(mdev->dev);
+	ret = omap_mbox_startup(mbox);
+	if (ret)
+		pm_runtime_put_sync(mdev->dev);
+	mutex_unlock(&mdev->cfg_lock);
+	return ret;
+}
+
+static void omap_mbox_chan_shutdown(struct mbox_chan *chan)
+{
+	struct omap_mbox *mbox = mbox_chan_to_omap_mbox(chan);
+	struct omap_mbox_device *mdev = mbox->parent;
+
+	mutex_lock(&mdev->cfg_lock);
+	omap_mbox_fini(mbox);
+	pm_runtime_put_sync(mdev->dev);
+	mutex_unlock(&mdev->cfg_lock);
+}
+
+static int omap_mbox_chan_send_noirq(struct omap_mbox *mbox, void *data)
+{
+	int ret = -EBUSY;
+
+	if (!mbox_fifo_full(mbox)) {
+		_omap_mbox_enable_irq(mbox, IRQ_RX);
+		mbox_fifo_write(mbox, (mbox_msg_t)data);
+		ret = 0;
+		_omap_mbox_disable_irq(mbox, IRQ_RX);
+
+		/* we must read and ack the interrupt directly from here */
+		mbox_fifo_read(mbox);
+		ack_mbox_irq(mbox, IRQ_RX);
+	}
+
+	return ret;
+}
+
+static int omap_mbox_chan_send(struct omap_mbox *mbox, void *data)
+{
+	int ret = -EBUSY;
+
+	if (!mbox_fifo_full(mbox)) {
+		mbox_fifo_write(mbox, (mbox_msg_t)data);
+		ret = 0;
+	}
+
+	/* always enable the interrupt */
+	_omap_mbox_enable_irq(mbox, IRQ_TX);
+	return ret;
+}
+
+static int omap_mbox_chan_send_data(struct mbox_chan *chan, void *data)
+{
+	struct omap_mbox *mbox = mbox_chan_to_omap_mbox(chan);
+	int ret;
+
+	if (!mbox)
+		return -EINVAL;
+
+	if (mbox->send_no_irq)
+		ret = omap_mbox_chan_send_noirq(mbox, data);
+	else
+		ret = omap_mbox_chan_send(mbox, data);
+
+	return ret;
+}
+
+static const struct mbox_chan_ops omap_mbox_chan_ops = {
+	.startup        = omap_mbox_chan_startup,
+	.send_data      = omap_mbox_chan_send_data,
+	.shutdown       = omap_mbox_chan_shutdown,
+};
+
+static const struct of_device_id omap_mailbox_of_match[] = {
+	{
+		.compatible	= "ti,omap2-mailbox",
+		.data		= (void *)MBOX_INTR_CFG_TYPE1,
+	},
+	{
+		.compatible	= "ti,omap3-mailbox",
+		.data		= (void *)MBOX_INTR_CFG_TYPE1,
+	},
+	{
+		.compatible	= "ti,omap4-mailbox",
+		.data		= (void *)MBOX_INTR_CFG_TYPE2,
+	},
+	{
+		/* end */
+	},
+};
+MODULE_DEVICE_TABLE(of, omap_mailbox_of_match);
+
+static struct mbox_chan *omap_mbox_of_xlate(struct mbox_controller *controller,
+					    const struct of_phandle_args *sp)
+{
+	phandle phandle = sp->args[0];
+	struct device_node *node;
+	struct omap_mbox_device *mdev;
+	struct omap_mbox *mbox;
+
+	mdev = container_of(controller, struct omap_mbox_device, controller);
+	if (WARN_ON(!mdev))
+		return ERR_PTR(-EINVAL);
+
+	node = of_find_node_by_phandle(phandle);
+	if (!node) {
+		pr_err("%s: could not find node phandle 0x%x\n",
+		       __func__, phandle);
+		return ERR_PTR(-ENODEV);
+	}
+
+	mbox = omap_mbox_device_find(mdev, node->name);
+	of_node_put(node);
+	return mbox ? mbox->chan : ERR_PTR(-ENOENT);
+}
+
+static int omap_mbox_probe(struct platform_device *pdev)
+{
+	struct resource *mem;
+	int ret;
+	struct mbox_chan *chnls;
+	struct omap_mbox **list, *mbox, *mboxblk;
+	struct omap_mbox_pdata *pdata = pdev->dev.platform_data;
+	struct omap_mbox_dev_info *info = NULL;
+	struct omap_mbox_fifo_info *finfo, *finfoblk;
+	struct omap_mbox_device *mdev;
+	struct omap_mbox_fifo *fifo;
+	struct device_node *node = pdev->dev.of_node;
+	struct device_node *child;
+	const struct of_device_id *match;
+	u32 intr_type, info_count;
+	u32 num_users, num_fifos;
+	u32 tmp[3];
+	u32 l;
+	int i;
+
+	if (!node && (!pdata || !pdata->info_cnt || !pdata->info)) {
+		pr_err("%s: platform not supported\n", __func__);
+		return -ENODEV;
+	}
+
+	if (node) {
+		match = of_match_device(omap_mailbox_of_match, &pdev->dev);
+		if (!match)
+			return -ENODEV;
+		intr_type = (u32)match->data;
+
+		if (of_property_read_u32(node, "ti,mbox-num-users",
+					 &num_users))
+			return -ENODEV;
+
+		if (of_property_read_u32(node, "ti,mbox-num-fifos",
+					 &num_fifos))
+			return -ENODEV;
+
+		info_count = of_get_available_child_count(node);
+		if (!info_count) {
+			dev_err(&pdev->dev, "no available mbox devices found\n");
+			return -ENODEV;
+		}
+	} else { /* non-DT device creation */
+		info_count = pdata->info_cnt;
+		info = pdata->info;
+		intr_type = pdata->intr_type;
+		num_users = pdata->num_users;
+		num_fifos = pdata->num_fifos;
+	}
+
+	finfoblk = devm_kzalloc(&pdev->dev, info_count * sizeof(*finfoblk),
+				GFP_KERNEL);
+	if (!finfoblk)
+		return -ENOMEM;
+
+	finfo = finfoblk;
+	child = NULL;
+	for (i = 0; i < info_count; i++, finfo++) {
+		if (node) {
+			child = of_get_next_available_child(node, child);
+			ret = of_property_read_u32_array(child, "ti,mbox-tx",
+							 tmp, ARRAY_SIZE(tmp));
+			if (ret)
+				return ret;
+			finfo->tx_id = tmp[0];
+			finfo->tx_irq = tmp[1];
+			finfo->tx_usr = tmp[2];
+
+			ret = of_property_read_u32_array(child, "ti,mbox-rx",
+							 tmp, ARRAY_SIZE(tmp));
+			if (ret)
+				return ret;
+			finfo->rx_id = tmp[0];
+			finfo->rx_irq = tmp[1];
+			finfo->rx_usr = tmp[2];
+
+			finfo->name = child->name;
+
+			if (of_find_property(child, "ti,mbox-send-noirq", NULL))
+				finfo->send_no_irq = true;
+		} else {
+			finfo->tx_id = info->tx_id;
+			finfo->rx_id = info->rx_id;
+			finfo->tx_usr = info->usr_id;
+			finfo->tx_irq = info->irq_id;
+			finfo->rx_usr = info->usr_id;
+			finfo->rx_irq = info->irq_id;
+			finfo->name = info->name;
+			info++;
+		}
+		if (finfo->tx_id >= num_fifos || finfo->rx_id >= num_fifos ||
+		    finfo->tx_usr >= num_users || finfo->rx_usr >= num_users)
+			return -EINVAL;
+	}
+
+	mdev = devm_kzalloc(&pdev->dev, sizeof(*mdev), GFP_KERNEL);
+	if (!mdev)
+		return -ENOMEM;
+
+	mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	mdev->mbox_base = devm_ioremap_resource(&pdev->dev, mem);
+	if (IS_ERR(mdev->mbox_base))
+		return PTR_ERR(mdev->mbox_base);
+
+	/* allocate one extra for marking end of list */
+	list = devm_kzalloc(&pdev->dev, (info_count + 1) * sizeof(*list),
+			    GFP_KERNEL);
+	if (!list)
+		return -ENOMEM;
+
+	chnls = devm_kzalloc(&pdev->dev, (info_count + 1) * sizeof(*chnls),
+			     GFP_KERNEL);
+	if (!chnls)
+		return -ENOMEM;
+
+	mboxblk = devm_kzalloc(&pdev->dev, info_count * sizeof(*mbox),
+			       GFP_KERNEL);
+	if (!mboxblk)
+		return -ENOMEM;
+
+	mbox = mboxblk;
+	finfo = finfoblk;
+	for (i = 0; i < info_count; i++, finfo++) {
+		fifo = &mbox->tx_fifo;
+		fifo->msg = MAILBOX_MESSAGE(finfo->tx_id);
+		fifo->fifo_stat = MAILBOX_FIFOSTATUS(finfo->tx_id);
+		fifo->intr_bit = MAILBOX_IRQ_NOTFULL(finfo->tx_id);
+		fifo->irqenable = MAILBOX_IRQENABLE(intr_type, finfo->tx_usr);
+		fifo->irqstatus = MAILBOX_IRQSTATUS(intr_type, finfo->tx_usr);
+		fifo->irqdisable = MAILBOX_IRQDISABLE(intr_type, finfo->tx_usr);
+
+		fifo = &mbox->rx_fifo;
+		fifo->msg = MAILBOX_MESSAGE(finfo->rx_id);
+		fifo->msg_stat =  MAILBOX_MSGSTATUS(finfo->rx_id);
+		fifo->intr_bit = MAILBOX_IRQ_NEWMSG(finfo->rx_id);
+		fifo->irqenable = MAILBOX_IRQENABLE(intr_type, finfo->rx_usr);
+		fifo->irqstatus = MAILBOX_IRQSTATUS(intr_type, finfo->rx_usr);
+		fifo->irqdisable = MAILBOX_IRQDISABLE(intr_type, finfo->rx_usr);
+
+		mbox->send_no_irq = finfo->send_no_irq;
+		mbox->intr_type = intr_type;
+
+		mbox->parent = mdev;
+		mbox->name = finfo->name;
+		mbox->irq = platform_get_irq(pdev, finfo->tx_irq);
+		if (mbox->irq < 0)
+			return mbox->irq;
+		mbox->chan = &chnls[i];
+		chnls[i].con_priv = mbox;
+		list[i] = mbox++;
+	}
+
+	mutex_init(&mdev->cfg_lock);
+	mdev->dev = &pdev->dev;
+	mdev->num_users = num_users;
+	mdev->num_fifos = num_fifos;
+	mdev->mboxes = list;
+
+	/* OMAP does not have a Tx-Done IRQ, but rather a Tx-Ready IRQ */
+	mdev->controller.txdone_irq = true;
+	mdev->controller.dev = mdev->dev;
+	mdev->controller.ops = &omap_mbox_chan_ops;
+	mdev->controller.chans = chnls;
+	mdev->controller.num_chans = info_count;
+	mdev->controller.of_xlate = omap_mbox_of_xlate;
+	ret = omap_mbox_register(mdev);
+	if (ret)
+		return ret;
+
+	platform_set_drvdata(pdev, mdev);
+	pm_runtime_enable(mdev->dev);
+
+	ret = pm_runtime_get_sync(mdev->dev);
+	if (ret < 0) {
+		pm_runtime_put_noidle(mdev->dev);
+		goto unregister;
+	}
+
+	/*
+	 * just print the raw revision register, the format is not
+	 * uniform across all SoCs
+	 */
+	l = mbox_read_reg(mdev, MAILBOX_REVISION);
+	dev_info(mdev->dev, "omap mailbox rev 0x%x\n", l);
+
+	ret = pm_runtime_put_sync(mdev->dev);
+	if (ret < 0)
+		goto unregister;
+
+	devm_kfree(&pdev->dev, finfoblk);
+	return 0;
+
+unregister:
+	pm_runtime_disable(mdev->dev);
+	omap_mbox_unregister(mdev);
+	return ret;
+}
+
+static int omap_mbox_remove(struct platform_device *pdev)
+{
+	struct omap_mbox_device *mdev = platform_get_drvdata(pdev);
+
+	pm_runtime_disable(mdev->dev);
+	omap_mbox_unregister(mdev);
+
+	return 0;
+}
+
+static struct platform_driver omap_mbox_driver = {
+	.probe	= omap_mbox_probe,
+	.remove	= omap_mbox_remove,
+	.driver	= {
+		.name = "omap-mailbox",
+		.of_match_table = of_match_ptr(omap_mailbox_of_match),
+	},
+};
+
+static int __init omap_mbox_init(void)
+{
+	int err;
+
+	err = class_register(&omap_mbox_class);
+	if (err)
+		return err;
+
+	/* kfifo size sanity check: alignment and minimal size */
+	mbox_kfifo_size = ALIGN(mbox_kfifo_size, sizeof(mbox_msg_t));
+	mbox_kfifo_size = max_t(unsigned int, mbox_kfifo_size,
+							sizeof(mbox_msg_t));
+
+	return platform_driver_register(&omap_mbox_driver);
+}
+subsys_initcall(omap_mbox_init);
+
+static void __exit omap_mbox_exit(void)
+{
+	platform_driver_unregister(&omap_mbox_driver);
+	class_unregister(&omap_mbox_class);
+}
+module_exit(omap_mbox_exit);
+
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("omap mailbox: interrupt driven messaging");
+MODULE_AUTHOR("Toshihiro Kobayashi");
+MODULE_AUTHOR("Hiroshi DOYU");
diff --git a/linux/drivers/mailbox/omap-mailbox.o b/linux/drivers/mailbox/omap-mailbox.o
new file mode 100644
index 00000000..c7130303
--- /dev/null
+++ b/linux/drivers/mailbox/omap-mailbox.o
diff --git a/linux/drivers/mailbox/pcc.c b/linux/drivers/mailbox/pcc.c
new file mode 100644
index 00000000..26d121d1
--- /dev/null
+++ b/linux/drivers/mailbox/pcc.c
@@ -0,0 +1,355 @@
+/*
+ *	Copyright (C) 2014 Linaro Ltd.
+ *	Author:	Ashwin Chaugule <ashwin.chaugule@linaro.org>
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  PCC (Platform Communication Channel) is defined in the ACPI 5.0+
+ *  specification. It is a mailbox like mechanism to allow clients
+ *  such as CPPC (Collaborative Processor Performance Control), RAS
+ *  (Reliability, Availability and Serviceability) and MPST (Memory
+ *  Node Power State Table) to talk to the platform (e.g. BMC) through
+ *  shared memory regions as defined in the PCC table entries. The PCC
+ *  specification supports a Doorbell mechanism for the PCC clients
+ *  to notify the platform about new data. This Doorbell information
+ *  is also specified in each PCC table entry.
+ *
+ *  Typical high level flow of operation is:
+ *
+ *  PCC Reads:
+ *  * Client tries to acquire a channel lock.
+ *  * After it is acquired it writes READ cmd in communication region cmd
+ *		address.
+ *  * Client issues mbox_send_message() which rings the PCC doorbell
+ *		for its PCC channel.
+ *  * If command completes, then client has control over channel and
+ *		it can proceed with its reads.
+ *  * Client releases lock.
+ *
+ *  PCC Writes:
+ *  * Client tries to acquire channel lock.
+ *  * Client writes to its communication region after it acquires a
+ *		channel lock.
+ *  * Client writes WRITE cmd in communication region cmd address.
+ *  * Client issues mbox_send_message() which rings the PCC doorbell
+ *		for its PCC channel.
+ *  * If command completes, then writes have succeded and it can release
+ *		the channel lock.
+ *
+ *  There is a Nominal latency defined for each channel which indicates
+ *  how long to wait until a command completes. If command is not complete
+ *  the client needs to retry or assume failure.
+ *
+ *	For more details about PCC, please see the ACPI specification from
+ *  http://www.uefi.org/ACPIv5.1 Section 14.
+ *
+ *  This file implements PCC as a Mailbox controller and allows for PCC
+ *  clients to be implemented as its Mailbox Client Channels.
+ */
+
+#include <linux/acpi.h>
+#include <linux/delay.h>
+#include <linux/io.h>
+#include <linux/init.h>
+#include <linux/list.h>
+#include <linux/platform_device.h>
+#include <linux/mailbox_controller.h>
+#include <linux/mailbox_client.h>
+
+#include "mailbox.h"
+
+#define MAX_PCC_SUBSPACES	256
+
+static struct mbox_chan *pcc_mbox_channels;
+
+static struct mbox_controller pcc_mbox_ctrl = {};
+/**
+ * get_pcc_channel - Given a PCC subspace idx, get
+ *	the respective mbox_channel.
+ * @id: PCC subspace index.
+ *
+ * Return: ERR_PTR(errno) if error, else pointer
+ *	to mbox channel.
+ */
+static struct mbox_chan *get_pcc_channel(int id)
+{
+	struct mbox_chan *pcc_chan;
+
+	if (id < 0 || id > pcc_mbox_ctrl.num_chans)
+		return ERR_PTR(-ENOENT);
+
+	pcc_chan = (struct mbox_chan *)
+		(unsigned long) pcc_mbox_channels +
+		(id * sizeof(*pcc_chan));
+
+	return pcc_chan;
+}
+
+/**
+ * pcc_mbox_request_channel - PCC clients call this function to
+ *		request a pointer to their PCC subspace, from which they
+ *		can get the details of communicating with the remote.
+ * @cl: Pointer to Mailbox client, so we know where to bind the
+ *		Channel.
+ * @subspace_id: The PCC Subspace index as parsed in the PCC client
+ *		ACPI package. This is used to lookup the array of PCC
+ *		subspaces as parsed by the PCC Mailbox controller.
+ *
+ * Return: Pointer to the Mailbox Channel if successful or
+ *		ERR_PTR.
+ */
+struct mbox_chan *pcc_mbox_request_channel(struct mbox_client *cl,
+		int subspace_id)
+{
+	struct device *dev = pcc_mbox_ctrl.dev;
+	struct mbox_chan *chan;
+	unsigned long flags;
+
+	/*
+	 * Each PCC Subspace is a Mailbox Channel.
+	 * The PCC Clients get their PCC Subspace ID
+	 * from their own tables and pass it here.
+	 * This returns a pointer to the PCC subspace
+	 * for the Client to operate on.
+	 */
+	chan = get_pcc_channel(subspace_id);
+
+	if (!chan || chan->cl) {
+		dev_err(dev, "Channel not found for idx: %d\n", subspace_id);
+		return ERR_PTR(-EBUSY);
+	}
+
+	spin_lock_irqsave(&chan->lock, flags);
+	chan->msg_free = 0;
+	chan->msg_count = 0;
+	chan->active_req = NULL;
+	chan->cl = cl;
+	init_completion(&chan->tx_complete);
+
+	if (chan->txdone_method == TXDONE_BY_POLL && cl->knows_txdone)
+		chan->txdone_method |= TXDONE_BY_ACK;
+
+	spin_unlock_irqrestore(&chan->lock, flags);
+
+	return chan;
+}
+EXPORT_SYMBOL_GPL(pcc_mbox_request_channel);
+
+/**
+ * pcc_mbox_free_channel - Clients call this to free their Channel.
+ *
+ * @chan: Pointer to the mailbox channel as returned by
+ *		pcc_mbox_request_channel()
+ */
+void pcc_mbox_free_channel(struct mbox_chan *chan)
+{
+	unsigned long flags;
+
+	if (!chan || !chan->cl)
+		return;
+
+	spin_lock_irqsave(&chan->lock, flags);
+	chan->cl = NULL;
+	chan->active_req = NULL;
+	if (chan->txdone_method == (TXDONE_BY_POLL | TXDONE_BY_ACK))
+		chan->txdone_method = TXDONE_BY_POLL;
+
+	spin_unlock_irqrestore(&chan->lock, flags);
+}
+EXPORT_SYMBOL_GPL(pcc_mbox_free_channel);
+
+/**
+ * pcc_send_data - Called from Mailbox Controller code. Used
+ *		here only to ring the channel doorbell. The PCC client
+ *		specific read/write is done in the client driver in
+ *		order to maintain atomicity over PCC channel once
+ *		OS has control over it. See above for flow of operations.
+ * @chan: Pointer to Mailbox channel over which to send data.
+ * @data: Client specific data written over channel. Used here
+ *		only for debug after PCC transaction completes.
+ *
+ * Return: Err if something failed else 0 for success.
+ */
+static int pcc_send_data(struct mbox_chan *chan, void *data)
+{
+	struct acpi_pcct_hw_reduced *pcct_ss = chan->con_priv;
+	struct acpi_generic_address doorbell;
+	u64 doorbell_preserve;
+	u64 doorbell_val;
+	u64 doorbell_write;
+
+	doorbell = pcct_ss->doorbell_register;
+	doorbell_preserve = pcct_ss->preserve_mask;
+	doorbell_write = pcct_ss->write_mask;
+
+	/* Sync notification from OS to Platform. */
+	acpi_read(&doorbell_val, &doorbell);
+	acpi_write((doorbell_val & doorbell_preserve) | doorbell_write,
+			&doorbell);
+
+	return 0;
+}
+
+static const struct mbox_chan_ops pcc_chan_ops = {
+	.send_data = pcc_send_data,
+};
+
+/**
+ * parse_pcc_subspace - Parse the PCC table and verify PCC subspace
+ *		entries. There should be one entry per PCC client.
+ * @header: Pointer to the ACPI subtable header under the PCCT.
+ * @end: End of subtable entry.
+ *
+ * Return: 0 for Success, else errno.
+ *
+ * This gets called for each entry in the PCC table.
+ */
+static int parse_pcc_subspace(struct acpi_subtable_header *header,
+		const unsigned long end)
+{
+	struct acpi_pcct_hw_reduced *pcct_ss;
+
+	if (pcc_mbox_ctrl.num_chans <= MAX_PCC_SUBSPACES) {
+		pcct_ss = (struct acpi_pcct_hw_reduced *) header;
+
+		if (pcct_ss->header.type !=
+				ACPI_PCCT_TYPE_HW_REDUCED_SUBSPACE) {
+			pr_err("Incorrect PCC Subspace type detected\n");
+			return -EINVAL;
+		}
+	}
+
+	return 0;
+}
+
+/**
+ * acpi_pcc_probe - Parse the ACPI tree for the PCCT.
+ *
+ * Return: 0 for Success, else errno.
+ */
+static int __init acpi_pcc_probe(void)
+{
+	acpi_size pcct_tbl_header_size;
+	struct acpi_table_header *pcct_tbl;
+	struct acpi_subtable_header *pcct_entry;
+	int count, i;
+	acpi_status status = AE_OK;
+
+	/* Search for PCCT */
+	status = acpi_get_table_with_size(ACPI_SIG_PCCT, 0,
+			&pcct_tbl,
+			&pcct_tbl_header_size);
+
+	if (ACPI_FAILURE(status) || !pcct_tbl) {
+		pr_warn("PCCT header not found.\n");
+		return -ENODEV;
+	}
+
+	count = acpi_table_parse_entries(ACPI_SIG_PCCT,
+			sizeof(struct acpi_table_pcct),
+			ACPI_PCCT_TYPE_HW_REDUCED_SUBSPACE,
+			parse_pcc_subspace, MAX_PCC_SUBSPACES);
+
+	if (count <= 0) {
+		pr_err("Error parsing PCC subspaces from PCCT\n");
+		return -EINVAL;
+	}
+
+	pcc_mbox_channels = kzalloc(sizeof(struct mbox_chan) *
+			count, GFP_KERNEL);
+
+	if (!pcc_mbox_channels) {
+		pr_err("Could not allocate space for PCC mbox channels\n");
+		return -ENOMEM;
+	}
+
+	/* Point to the first PCC subspace entry */
+	pcct_entry = (struct acpi_subtable_header *) (
+		(unsigned long) pcct_tbl + sizeof(struct acpi_table_pcct));
+
+	for (i = 0; i < count; i++) {
+		pcc_mbox_channels[i].con_priv = pcct_entry;
+		pcct_entry = (struct acpi_subtable_header *)
+			((unsigned long) pcct_entry + pcct_entry->length);
+	}
+
+	pcc_mbox_ctrl.num_chans = count;
+
+	pr_info("Detected %d PCC Subspaces\n", pcc_mbox_ctrl.num_chans);
+
+	return 0;
+}
+
+/**
+ * pcc_mbox_probe - Called when we find a match for the
+ *	PCCT platform device. This is purely used to represent
+ *	the PCCT as a virtual device for registering with the
+ *	generic Mailbox framework.
+ *
+ * @pdev: Pointer to platform device returned when a match
+ *	is found.
+ *
+ *	Return: 0 for Success, else errno.
+ */
+static int pcc_mbox_probe(struct platform_device *pdev)
+{
+	int ret = 0;
+
+	pcc_mbox_ctrl.chans = pcc_mbox_channels;
+	pcc_mbox_ctrl.ops = &pcc_chan_ops;
+	pcc_mbox_ctrl.dev = &pdev->dev;
+
+	pr_info("Registering PCC driver as Mailbox controller\n");
+	ret = mbox_controller_register(&pcc_mbox_ctrl);
+
+	if (ret) {
+		pr_err("Err registering PCC as Mailbox controller: %d\n", ret);
+		ret = -ENODEV;
+	}
+
+	return ret;
+}
+
+struct platform_driver pcc_mbox_driver = {
+	.probe = pcc_mbox_probe,
+	.driver = {
+		.name = "PCCT",
+		.owner = THIS_MODULE,
+	},
+};
+
+static int __init pcc_init(void)
+{
+	int ret;
+	struct platform_device *pcc_pdev;
+
+	if (acpi_disabled)
+		return -ENODEV;
+
+	/* Check if PCC support is available. */
+	ret = acpi_pcc_probe();
+
+	if (ret) {
+		pr_debug("ACPI PCC probe failed.\n");
+		return -ENODEV;
+	}
+
+	pcc_pdev = platform_create_bundle(&pcc_mbox_driver,
+			pcc_mbox_probe, NULL, 0, NULL, 0);
+
+	if (IS_ERR(pcc_pdev)) {
+		pr_debug("Err creating PCC platform bundle\n");
+		return PTR_ERR(pcc_pdev);
+	}
+
+	return 0;
+}
+device_initcall(pcc_init);
diff --git a/linux/drivers/mailbox/pl320-ipc.c b/linux/drivers/mailbox/pl320-ipc.c
new file mode 100644
index 00000000..f3755e0a
--- /dev/null
+++ b/linux/drivers/mailbox/pl320-ipc.c
@@ -0,0 +1,198 @@
+/*
+ * Copyright 2012 Calxeda, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#include <linux/types.h>
+#include <linux/err.h>
+#include <linux/delay.h>
+#include <linux/export.h>
+#include <linux/io.h>
+#include <linux/interrupt.h>
+#include <linux/completion.h>
+#include <linux/mutex.h>
+#include <linux/notifier.h>
+#include <linux/spinlock.h>
+#include <linux/device.h>
+#include <linux/amba/bus.h>
+
+#include <linux/pl320-ipc.h>
+
+#define IPCMxSOURCE(m)		((m) * 0x40)
+#define IPCMxDSET(m)		(((m) * 0x40) + 0x004)
+#define IPCMxDCLEAR(m)		(((m) * 0x40) + 0x008)
+#define IPCMxDSTATUS(m)		(((m) * 0x40) + 0x00C)
+#define IPCMxMODE(m)		(((m) * 0x40) + 0x010)
+#define IPCMxMSET(m)		(((m) * 0x40) + 0x014)
+#define IPCMxMCLEAR(m)		(((m) * 0x40) + 0x018)
+#define IPCMxMSTATUS(m)		(((m) * 0x40) + 0x01C)
+#define IPCMxSEND(m)		(((m) * 0x40) + 0x020)
+#define IPCMxDR(m, dr)		(((m) * 0x40) + ((dr) * 4) + 0x024)
+
+#define IPCMMIS(irq)		(((irq) * 8) + 0x800)
+#define IPCMRIS(irq)		(((irq) * 8) + 0x804)
+
+#define MBOX_MASK(n)		(1 << (n))
+#define IPC_TX_MBOX		1
+#define IPC_RX_MBOX		2
+
+#define CHAN_MASK(n)		(1 << (n))
+#define A9_SOURCE		1
+#define M3_SOURCE		0
+
+static void __iomem *ipc_base;
+static int ipc_irq;
+static DEFINE_MUTEX(ipc_m1_lock);
+static DECLARE_COMPLETION(ipc_completion);
+static ATOMIC_NOTIFIER_HEAD(ipc_notifier);
+
+static inline void set_destination(int source, int mbox)
+{
+	__raw_writel(CHAN_MASK(source), ipc_base + IPCMxDSET(mbox));
+	__raw_writel(CHAN_MASK(source), ipc_base + IPCMxMSET(mbox));
+}
+
+static inline void clear_destination(int source, int mbox)
+{
+	__raw_writel(CHAN_MASK(source), ipc_base + IPCMxDCLEAR(mbox));
+	__raw_writel(CHAN_MASK(source), ipc_base + IPCMxMCLEAR(mbox));
+}
+
+static void __ipc_send(int mbox, u32 *data)
+{
+	int i;
+	for (i = 0; i < 7; i++)
+		__raw_writel(data[i], ipc_base + IPCMxDR(mbox, i));
+	__raw_writel(0x1, ipc_base + IPCMxSEND(mbox));
+}
+
+static u32 __ipc_rcv(int mbox, u32 *data)
+{
+	int i;
+	for (i = 0; i < 7; i++)
+		data[i] = __raw_readl(ipc_base + IPCMxDR(mbox, i));
+	return data[1];
+}
+
+/* blocking implmentation from the A9 side, not usuable in interrupts! */
+int pl320_ipc_transmit(u32 *data)
+{
+	int ret;
+
+	mutex_lock(&ipc_m1_lock);
+
+	init_completion(&ipc_completion);
+	__ipc_send(IPC_TX_MBOX, data);
+	ret = wait_for_completion_timeout(&ipc_completion,
+					  msecs_to_jiffies(1000));
+	if (ret == 0) {
+		ret = -ETIMEDOUT;
+		goto out;
+	}
+
+	ret = __ipc_rcv(IPC_TX_MBOX, data);
+out:
+	mutex_unlock(&ipc_m1_lock);
+	return ret;
+}
+EXPORT_SYMBOL_GPL(pl320_ipc_transmit);
+
+static irqreturn_t ipc_handler(int irq, void *dev)
+{
+	u32 irq_stat;
+	u32 data[7];
+
+	irq_stat = __raw_readl(ipc_base + IPCMMIS(1));
+	if (irq_stat & MBOX_MASK(IPC_TX_MBOX)) {
+		__raw_writel(0, ipc_base + IPCMxSEND(IPC_TX_MBOX));
+		complete(&ipc_completion);
+	}
+	if (irq_stat & MBOX_MASK(IPC_RX_MBOX)) {
+		__ipc_rcv(IPC_RX_MBOX, data);
+		atomic_notifier_call_chain(&ipc_notifier, data[0], data + 1);
+		__raw_writel(2, ipc_base + IPCMxSEND(IPC_RX_MBOX));
+	}
+
+	return IRQ_HANDLED;
+}
+
+int pl320_ipc_register_notifier(struct notifier_block *nb)
+{
+	return atomic_notifier_chain_register(&ipc_notifier, nb);
+}
+EXPORT_SYMBOL_GPL(pl320_ipc_register_notifier);
+
+int pl320_ipc_unregister_notifier(struct notifier_block *nb)
+{
+	return atomic_notifier_chain_unregister(&ipc_notifier, nb);
+}
+EXPORT_SYMBOL_GPL(pl320_ipc_unregister_notifier);
+
+static int pl320_probe(struct amba_device *adev, const struct amba_id *id)
+{
+	int ret;
+
+	ipc_base = ioremap(adev->res.start, resource_size(&adev->res));
+	if (ipc_base == NULL)
+		return -ENOMEM;
+
+	__raw_writel(0, ipc_base + IPCMxSEND(IPC_TX_MBOX));
+
+	ipc_irq = adev->irq[0];
+	ret = request_irq(ipc_irq, ipc_handler, 0, dev_name(&adev->dev), NULL);
+	if (ret < 0)
+		goto err;
+
+	/* Init slow mailbox */
+	__raw_writel(CHAN_MASK(A9_SOURCE),
+			ipc_base + IPCMxSOURCE(IPC_TX_MBOX));
+	__raw_writel(CHAN_MASK(M3_SOURCE),
+			ipc_base + IPCMxDSET(IPC_TX_MBOX));
+	__raw_writel(CHAN_MASK(M3_SOURCE) | CHAN_MASK(A9_SOURCE),
+		     ipc_base + IPCMxMSET(IPC_TX_MBOX));
+
+	/* Init receive mailbox */
+	__raw_writel(CHAN_MASK(M3_SOURCE),
+			ipc_base + IPCMxSOURCE(IPC_RX_MBOX));
+	__raw_writel(CHAN_MASK(A9_SOURCE),
+			ipc_base + IPCMxDSET(IPC_RX_MBOX));
+	__raw_writel(CHAN_MASK(M3_SOURCE) | CHAN_MASK(A9_SOURCE),
+		     ipc_base + IPCMxMSET(IPC_RX_MBOX));
+
+	return 0;
+err:
+	iounmap(ipc_base);
+	return ret;
+}
+
+static struct amba_id pl320_ids[] = {
+	{
+		.id	= 0x00041320,
+		.mask	= 0x000fffff,
+	},
+	{ 0, 0 },
+};
+
+static struct amba_driver pl320_driver = {
+	.drv = {
+		.name	= "pl320",
+	},
+	.id_table	= pl320_ids,
+	.probe		= pl320_probe,
+};
+
+static int __init ipc_init(void)
+{
+	return amba_driver_register(&pl320_driver);
+}
+module_init(ipc_init);
diff --git a/linux/drivers/mailbox/ti-msgmgr.c b/linux/drivers/mailbox/ti-msgmgr.c
new file mode 100644
index 00000000..46f1b0ad
--- /dev/null
+++ b/linux/drivers/mailbox/ti-msgmgr.c
@@ -0,0 +1,603 @@
+/*
+ * Texas Instruments' Message Manager Driver
+ *
+ * Copyright (C) 2015 Texas Instruments Incorporated - http://www.ti.com/
+ *	Nishanth Menon
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
+ * kind, whether express or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#define pr_fmt(fmt) "%s: " fmt, __func__
+
+#include <linux/device.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/mailbox_controller.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/of.h>
+#include <linux/of_irq.h>
+#include <linux/platform_device.h>
+#include <linux/ti-msgmgr.h>
+
+#define Q_DATA_OFFSET(proxy, queue, reg)	\
+		     ((0x10000 * (proxy)) + (0x80 * (queue)) + ((reg) * 4))
+#define Q_STATE_OFFSET(queue)			((queue) * 0x4)
+#define Q_STATE_ENTRY_COUNT_MASK		(0xFFF000)
+
+/**
+ * struct ti_msgmgr_desc - Description of message manager integration
+ * @queue_count:	Number of Queues
+ * @max_message_size:	Message size in bytes
+ * @max_messages:	Number of messages
+ * @q_slices:		Number of queue engines
+ * @q_proxies:		Number of queue proxies per page
+ * @data_first_reg:	First data register for proxy data region
+ * @data_last_reg:	Last data register for proxy data region
+ * @tx_polled:		Do I need to use polled mechanism for tx
+ * @tx_poll_timeout_ms: Timeout in ms if polled
+ *
+ * This structure is used in of match data to describe how integration
+ * for a specific compatible SoC is done.
+ */
+struct ti_msgmgr_desc {
+	u8 queue_count;
+	u8 max_message_size;
+	u8 max_messages;
+	u8 q_slices;
+	u8 q_proxies;
+	u8 data_first_reg;
+	u8 data_last_reg;
+	bool tx_polled;
+	int tx_poll_timeout_ms;
+};
+
+/**
+ * struct ti_queue_inst - Description of a queue instance
+ * @name:	Queue Name
+ * @queue_id:	Queue Identifier as mapped on SoC
+ * @proxy_id:	Proxy Identifier as mapped on SoC
+ * @irq:	IRQ for Rx Queue
+ * @is_tx:	'true' if transmit queue, else, 'false'
+ * @queue_buff_start: First register of Data Buffer
+ * @queue_buff_end: Last (or confirmation) register of Data buffer
+ * @queue_state: Queue status register
+ * @chan:	Mailbox channel
+ * @rx_buff:	Receive buffer pointer allocated at probe, max_message_size
+ */
+struct ti_queue_inst {
+	const char *name;
+	u32 queue_id;
+	u32 proxy_id;
+	int irq;
+	bool is_tx;
+	void __iomem *queue_buff_start;
+	void __iomem *queue_buff_end;
+	void __iomem *queue_state;
+	struct mbox_chan *chan;
+	u32 *rx_buff;
+};
+
+/**
+ * struct ti_msgmgr_inst - Description of a Message Manager Instance
+ * @dev:	device pointer corresponding to the Message Manager instance
+ * @desc:	Description of the SoC integration
+ * @queue_proxy_region:	Queue proxy region where queue buffers are located
+ * @queue_state_debug_region:	Queue status register regions
+ * @num_valid_queues:	Number of valid queues defined for the processor
+ *		Note: other queues are probably reserved for other processors
+ *		in the SoC.
+ * @qinsts:	Array of valid Queue Instances for the Processor
+ * @mbox:	Mailbox Controller
+ * @chans:	Array for channels corresponding to the Queue Instances.
+ */
+struct ti_msgmgr_inst {
+	struct device *dev;
+	const struct ti_msgmgr_desc *desc;
+	void __iomem *queue_proxy_region;
+	void __iomem *queue_state_debug_region;
+	u8 num_valid_queues;
+	struct ti_queue_inst *qinsts;
+	struct mbox_controller mbox;
+	struct mbox_chan *chans;
+};
+
+/**
+ * ti_msgmgr_queue_get_num_messages() - Get the number of pending messages
+ * @qinst:	Queue instance for which we check the number of pending messages
+ *
+ * Return: number of messages pending in the queue (0 == no pending messages)
+ */
+static inline int ti_msgmgr_queue_get_num_messages(struct ti_queue_inst *qinst)
+{
+	u32 val;
+
+	/*
+	 * We cannot use relaxed operation here - update may happen
+	 * real-time.
+	 */
+	val = readl(qinst->queue_state) & Q_STATE_ENTRY_COUNT_MASK;
+	val >>= __ffs(Q_STATE_ENTRY_COUNT_MASK);
+
+	return val;
+}
+
+/**
+ * ti_msgmgr_queue_rx_interrupt() - Interrupt handler for receive Queue
+ * @irq:	Interrupt number
+ * @p:		Channel Pointer
+ *
+ * Return: -EINVAL if there is no instance
+ * IRQ_NONE if the interrupt is not ours.
+ * IRQ_HANDLED if the rx interrupt was successfully handled.
+ */
+static irqreturn_t ti_msgmgr_queue_rx_interrupt(int irq, void *p)
+{
+	struct mbox_chan *chan = p;
+	struct device *dev = chan->mbox->dev;
+	struct ti_msgmgr_inst *inst = dev_get_drvdata(dev);
+	struct ti_queue_inst *qinst = chan->con_priv;
+	const struct ti_msgmgr_desc *desc;
+	int msg_count, num_words;
+	struct ti_msgmgr_message message;
+	void __iomem *data_reg;
+	u32 *word_data;
+
+	if (WARN_ON(!inst)) {
+		dev_err(dev, "no platform drv data??\n");
+		return -EINVAL;
+	}
+
+	/* Do I have an invalid interrupt source? */
+	if (qinst->is_tx) {
+		dev_err(dev, "Cannot handle rx interrupt on tx channel %s\n",
+			qinst->name);
+		return IRQ_NONE;
+	}
+
+	/* Do I actually have messages to read? */
+	msg_count = ti_msgmgr_queue_get_num_messages(qinst);
+	if (!msg_count) {
+		dev_dbg(dev, "Spurious event - 0 pending data!\n");
+		return IRQ_NONE;
+	}
+
+	/*
+	 * I have no idea about the protocol being used to communicate with the
+	 * remote producer - 0 is valid data, so I wont make a judgement of how
+	 * many bytes I should be reading. Let the client figure this out.. I
+	 * just read the full message and pass it on..
+	 */
+	desc = inst->desc;
+	message.len = desc->max_message_size;
+	message.buf = (u8 *)qinst->rx_buff;
+
+	/*
+	 * NOTE about register access involved here:
+	 * the hardware block is implemented with 32bit access operations and no
+	 * support for data splitting.  We don't want the hardware to misbehave
+	 * with sub 32bit access - For example: if the last register read is
+	 * split into byte wise access, it can result in the queue getting
+	 * stuck or indeterminate behavior. Hence, we do not use memcpy_fromio
+	 * here.
+	 * Also note that the final register read automatically marks the
+	 * queue message as read.
+	 */
+	for (data_reg = qinst->queue_buff_start, word_data = qinst->rx_buff,
+	     num_words = (desc->max_message_size / sizeof(u32));
+	     num_words; num_words--, data_reg += sizeof(u32), word_data++)
+		*word_data = readl(data_reg);
+
+	/*
+	 * Last register read automatically clears the IRQ if only 1 message
+	 * is pending - so send the data up the stack..
+	 * NOTE: Client is expected to be as optimal as possible, since
+	 * we invoke the handler in IRQ context.
+	 */
+	mbox_chan_received_data(chan, (void *)&message);
+
+	return IRQ_HANDLED;
+}
+
+/**
+ * ti_msgmgr_queue_peek_data() - Peek to see if there are any rx messages.
+ * @chan:	Channel Pointer
+ *
+ * Return: 'true' if there is pending rx data, 'false' if there is none.
+ */
+static bool ti_msgmgr_queue_peek_data(struct mbox_chan *chan)
+{
+	struct ti_queue_inst *qinst = chan->con_priv;
+	int msg_count;
+
+	if (qinst->is_tx)
+		return false;
+
+	msg_count = ti_msgmgr_queue_get_num_messages(qinst);
+
+	return msg_count ? true : false;
+}
+
+/**
+ * ti_msgmgr_last_tx_done() - See if all the tx messages are sent
+ * @chan:	Channel pointer
+ *
+ * Return: 'true' is no pending tx data, 'false' if there are any.
+ */
+static bool ti_msgmgr_last_tx_done(struct mbox_chan *chan)
+{
+	struct ti_queue_inst *qinst = chan->con_priv;
+	int msg_count;
+
+	if (!qinst->is_tx)
+		return false;
+
+	msg_count = ti_msgmgr_queue_get_num_messages(qinst);
+
+	/* if we have any messages pending.. */
+	return msg_count ? false : true;
+}
+
+/**
+ * ti_msgmgr_send_data() - Send data
+ * @chan:	Channel Pointer
+ * @data:	ti_msgmgr_message * Message Pointer
+ *
+ * Return: 0 if all goes good, else appropriate error messages.
+ */
+static int ti_msgmgr_send_data(struct mbox_chan *chan, void *data)
+{
+	struct device *dev = chan->mbox->dev;
+	struct ti_msgmgr_inst *inst = dev_get_drvdata(dev);
+	const struct ti_msgmgr_desc *desc;
+	struct ti_queue_inst *qinst = chan->con_priv;
+	int msg_count, num_words, trail_bytes;
+	struct ti_msgmgr_message *message = data;
+	void __iomem *data_reg;
+	u32 *word_data;
+
+	if (WARN_ON(!inst)) {
+		dev_err(dev, "no platform drv data??\n");
+		return -EINVAL;
+	}
+	desc = inst->desc;
+
+	if (desc->max_message_size < message->len) {
+		dev_err(dev, "Queue %s message length %d > max %d\n",
+			qinst->name, message->len, desc->max_message_size);
+		return -EINVAL;
+	}
+
+	/* Are we able to send this or not? */
+	msg_count = ti_msgmgr_queue_get_num_messages(qinst);
+	if (msg_count >= desc->max_messages) {
+		dev_warn(dev, "Queue %s is full (%d messages)\n", qinst->name,
+			 msg_count);
+		return -EBUSY;
+	}
+
+	/*
+	 * NOTE about register access involved here:
+	 * the hardware block is implemented with 32bit access operations and no
+	 * support for data splitting.  We don't want the hardware to misbehave
+	 * with sub 32bit access - For example: if the last register write is
+	 * split into byte wise access, it can result in the queue getting
+	 * stuck or dummy messages being transmitted or indeterminate behavior.
+	 * Hence, we do not use memcpy_toio here.
+	 */
+	for (data_reg = qinst->queue_buff_start,
+	     num_words = message->len / sizeof(u32),
+	     word_data = (u32 *)message->buf;
+	     num_words; num_words--, data_reg += sizeof(u32), word_data++)
+		writel(*word_data, data_reg);
+
+	trail_bytes = message->len % sizeof(u32);
+	if (trail_bytes) {
+		u32 data_trail = *word_data;
+
+		/* Ensure all unused data is 0 */
+		data_trail &= 0xFFFFFFFF >> (8 * (sizeof(u32) - trail_bytes));
+		writel(data_trail, data_reg);
+		data_reg++;
+	}
+	/*
+	 * 'data_reg' indicates next register to write. If we did not already
+	 * write on tx complete reg(last reg), we must do so for transmit
+	 */
+	if (data_reg <= qinst->queue_buff_end)
+		writel(0, qinst->queue_buff_end);
+
+	return 0;
+}
+
+/**
+ * ti_msgmgr_queue_startup() - Startup queue
+ * @chan:	Channel pointer
+ *
+ * Return: 0 if all goes good, else return corresponding error message
+ */
+static int ti_msgmgr_queue_startup(struct mbox_chan *chan)
+{
+	struct ti_queue_inst *qinst = chan->con_priv;
+	struct device *dev = chan->mbox->dev;
+	int ret;
+
+	if (!qinst->is_tx) {
+		/*
+		 * With the expectation that the IRQ might be shared in
+		 * future
+		 */
+		ret = request_irq(qinst->irq, ti_msgmgr_queue_rx_interrupt,
+				  IRQF_SHARED, qinst->name, chan);
+		if (ret) {
+			dev_err(dev, "Unable to get IRQ %d on %s(res=%d)\n",
+				qinst->irq, qinst->name, ret);
+			return ret;
+		}
+	}
+
+	return 0;
+}
+
+/**
+ * ti_msgmgr_queue_shutdown() - Shutdown the queue
+ * @chan:	Channel pointer
+ */
+static void ti_msgmgr_queue_shutdown(struct mbox_chan *chan)
+{
+	struct ti_queue_inst *qinst = chan->con_priv;
+
+	if (!qinst->is_tx)
+		free_irq(qinst->irq, chan);
+}
+
+/**
+ * ti_msgmgr_of_xlate() - Translation of phandle to queue
+ * @mbox:	Mailbox controller
+ * @p:		phandle pointer
+ *
+ * Return: Mailbox channel corresponding to the queue, else return error
+ * pointer.
+ */
+static struct mbox_chan *ti_msgmgr_of_xlate(struct mbox_controller *mbox,
+					    const struct of_phandle_args *p)
+{
+	struct ti_msgmgr_inst *inst;
+	struct device_node *np;
+	phandle phandle = p->args[0];
+	struct ti_queue_inst *qinst;
+	int i;
+	struct mbox_chan *chan = ERR_PTR(-ENOENT);
+
+	inst = container_of(mbox, struct ti_msgmgr_inst, mbox);
+	if (WARN_ON(!inst))
+		return ERR_PTR(-EINVAL);
+
+	np = of_find_node_by_phandle(phandle);
+	if (!np) {
+		dev_err(inst->dev, "Unable to find phandle %p\n", p);
+		return ERR_PTR(-ENODEV);
+	}
+
+	for (qinst = inst->qinsts, i = 0; i < inst->num_valid_queues;
+	     i++, qinst++) {
+		/* not using strncmp: What could be a valid length here?? */
+		if (!strcmp(qinst->name, np->name)) {
+			chan = qinst->chan;
+			break;
+		}
+	}
+	of_node_put(np);
+
+	return chan;
+}
+
+/* Queue operations */
+static const struct mbox_chan_ops ti_msgmgr_chan_ops = {
+	.startup = ti_msgmgr_queue_startup,
+	.shutdown = ti_msgmgr_queue_shutdown,
+	.peek_data = ti_msgmgr_queue_peek_data,
+	.last_tx_done = ti_msgmgr_last_tx_done,
+	.send_data = ti_msgmgr_send_data,
+};
+
+/* Keystone K2G SoC integration details */
+static const struct ti_msgmgr_desc k2g_desc = {
+	.queue_count = 64,
+	.max_message_size = 64,
+	.max_messages = 128,
+	.q_slices = 1,
+	.q_proxies = 1,
+	.data_first_reg = 16,
+	.data_last_reg = 31,
+	.tx_polled = false,
+};
+
+static const struct of_device_id ti_msgmgr_of_match[] = {
+	{.compatible = "ti,k2g-message-manager", .data = &k2g_desc},
+	{.compatible = "ti,message-manager", .data = &k2g_desc},
+	{ /* Sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, ti_msgmgr_of_match);
+
+static int ti_msgmgr_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	const struct of_device_id *of_id;
+	struct device_node *np, *child;
+	struct resource *res;
+	const struct ti_msgmgr_desc *desc;
+	struct ti_msgmgr_inst *inst;
+	struct ti_queue_inst *qinst;
+	struct mbox_controller *mbox;
+	struct mbox_chan *chans;
+	int queue_count;
+	int i;
+	int ret = -EINVAL;
+
+	if (!dev->of_node) {
+		dev_err(dev, "no OF information\n");
+		return -EINVAL;
+	}
+	np = dev->of_node;
+
+	of_id = of_match_device(ti_msgmgr_of_match, dev);
+	if (!of_id) {
+		dev_err(dev, "OF data missing\n");
+		return -EINVAL;
+	}
+	desc = of_id->data;
+
+	inst = devm_kzalloc(dev, sizeof(*inst), GFP_KERNEL);
+	if (!inst)
+		return -ENOMEM;
+
+	inst->dev = dev;
+	inst->desc = desc;
+
+	res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
+					   "queue_proxy_region");
+	inst->queue_proxy_region = devm_ioremap_resource(dev, res);
+	if (IS_ERR(inst->queue_proxy_region))
+		return PTR_ERR(inst->queue_proxy_region);
+
+	res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
+					   "queue_state_debug_region");
+	inst->queue_state_debug_region = devm_ioremap_resource(dev, res);
+	if (IS_ERR(inst->queue_state_debug_region))
+		return PTR_ERR(inst->queue_state_debug_region);
+
+	dev_dbg(dev, "proxy region=%p, queue_state=%p\n",
+		inst->queue_proxy_region, inst->queue_state_debug_region);
+
+	queue_count = of_get_available_child_count(np);
+	if (!queue_count) {
+		dev_err(dev, "No child nodes representing queues\n");
+		return -EINVAL;
+	}
+	if (queue_count > desc->queue_count) {
+		dev_err(dev, "Number of queues %d > max %d\n",
+			queue_count, desc->queue_count);
+		return -ERANGE;
+	}
+	inst->num_valid_queues = queue_count;
+
+	qinst = devm_kzalloc(dev, sizeof(*qinst) * queue_count, GFP_KERNEL);
+	if (!qinst)
+		return -ENOMEM;
+	inst->qinsts = qinst;
+
+	chans = devm_kzalloc(dev, sizeof(*chans) * queue_count, GFP_KERNEL);
+	if (!chans)
+		return -ENOMEM;
+	inst->chans = chans;
+
+	for (i = 0, child = NULL; i < queue_count; i++, qinst++, chans++) {
+		child = of_get_next_available_child(np, child);
+		ret = of_property_read_u32(child, "ti,queue-id",
+					   &qinst->queue_id);
+		if (ret) {
+			dev_err(dev, "Child node %s[idx=%d] has no queue-id\n",
+				child->name, i);
+			return -EINVAL;
+		}
+		if (qinst->queue_id > desc->queue_count) {
+			dev_err(dev, "Child node %s[idx=%d] queuid %d > %d\n",
+				child->name, i, qinst->queue_id,
+				desc->queue_count);
+			return -ERANGE;
+		}
+
+		ret = of_property_read_u32(child, "ti,proxy-id",
+					   &qinst->proxy_id);
+		if (ret) {
+			dev_err(dev, "Child node %s[idx=%d] has no proxy-id\n",
+				child->name, i);
+			return -EINVAL;
+		}
+
+		qinst->irq = of_irq_get_byname(child, "rx");
+		/* TX queues don't have IRQ numbers */
+		if (qinst->irq < 0) {
+			qinst->irq = -1;
+			qinst->is_tx = true;
+		}
+
+		qinst->queue_buff_start = inst->queue_proxy_region +
+		    Q_DATA_OFFSET(qinst->proxy_id, qinst->queue_id,
+				  desc->data_first_reg);
+		qinst->queue_buff_end = inst->queue_proxy_region +
+		    Q_DATA_OFFSET(qinst->proxy_id, qinst->queue_id,
+				  desc->data_last_reg);
+		qinst->queue_state = inst->queue_state_debug_region +
+		    Q_STATE_OFFSET(qinst->queue_id);
+		qinst->name = child->name;
+		qinst->chan = chans;
+
+		/* Allocate usage buffer for rx */
+		if (!qinst->is_tx) {
+			qinst->rx_buff = devm_kzalloc(dev,
+						      desc->max_message_size,
+						      GFP_KERNEL);
+			if (!qinst->rx_buff)
+				return -ENOMEM;
+		}
+
+		chans->con_priv = qinst;
+
+		dev_dbg(dev, "[%d] qidx=%d pidx=%d irq=%d q_s=%p q_e = %p\n",
+			i, qinst->queue_id, qinst->proxy_id, qinst->irq,
+			qinst->queue_buff_start, qinst->queue_buff_end);
+	}
+
+	mbox = &inst->mbox;
+	mbox->dev = dev;
+	mbox->ops = &ti_msgmgr_chan_ops;
+	mbox->chans = inst->chans;
+	mbox->num_chans = inst->num_valid_queues;
+	mbox->txdone_irq = false;
+	mbox->txdone_poll = desc->tx_polled;
+	if (desc->tx_polled)
+		mbox->txpoll_period = desc->tx_poll_timeout_ms;
+	mbox->of_xlate = ti_msgmgr_of_xlate;
+
+	platform_set_drvdata(pdev, inst);
+	ret = mbox_controller_register(mbox);
+	if (ret)
+		dev_err(dev, "Failed to register mbox_controller(%d)\n", ret);
+
+	return ret;
+}
+
+static int ti_msgmgr_remove(struct platform_device *pdev)
+{
+	struct ti_msgmgr_inst *inst;
+
+	inst = platform_get_drvdata(pdev);
+	mbox_controller_unregister(&inst->mbox);
+
+	return 0;
+}
+
+static struct platform_driver ti_msgmgr_driver = {
+	.probe = ti_msgmgr_probe,
+	.remove = ti_msgmgr_remove,
+	.driver = {
+		   .name = "ti-msgmgr",
+		   .of_match_table = of_match_ptr(ti_msgmgr_of_match),
+	},
+};
+module_platform_driver(ti_msgmgr_driver);
+
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("TI message manager driver");
+MODULE_AUTHOR("Nishanth Menon");
+MODULE_ALIAS("platform:ti-msgmgr");