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authorBin Meng <bmeng.cn@gmail.com>2018-07-19 03:07:30 -0700
committerBin Meng <bmeng.cn@gmail.com>2018-07-20 09:33:22 +0800
commit4c99ccfe13e8f1a1d3cf5be567fa16e2aa68188e (patch)
tree5d45b9363b72cb7c85266597fcb290581041736b /arch/x86
parentc81a8f54553a31925d4d26435bd104543bbe85af (diff)
x86: tangier: Add a sysreset driver
This adds a reset driver for tangier processor. Signed-off-by: Bin Meng <bmeng.cn@gmail.com> Reviewed-by: Simon Glass <sjg@chromium.org> Tested-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Diffstat (limited to 'arch/x86')
-rw-r--r--arch/x86/cpu/tangier/Makefile2
-rw-r--r--arch/x86/cpu/tangier/sysreset.c48
2 files changed, 49 insertions, 1 deletions
diff --git a/arch/x86/cpu/tangier/Makefile b/arch/x86/cpu/tangier/Makefile
index 44ccb3ff91..827448257e 100644
--- a/arch/x86/cpu/tangier/Makefile
+++ b/arch/x86/cpu/tangier/Makefile
@@ -2,5 +2,5 @@
#
# Copyright (c) 2017 Intel Corporation
-obj-y += car.o tangier.o sdram.o
+obj-y += car.o tangier.o sdram.o sysreset.o
obj-$(CONFIG_GENERATE_ACPI_TABLE) += acpi.o
diff --git a/arch/x86/cpu/tangier/sysreset.c b/arch/x86/cpu/tangier/sysreset.c
new file mode 100644
index 0000000000..e762ee1b81
--- /dev/null
+++ b/arch/x86/cpu/tangier/sysreset.c
@@ -0,0 +1,48 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2018, Bin Meng <bmeng.cn@gmail.com>
+ *
+ * Reset driver for tangier processor
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <sysreset.h>
+#include <asm/scu.h>
+
+static int tangier_sysreset_request(struct udevice *dev, enum sysreset_t type)
+{
+ int value;
+
+ switch (type) {
+ case SYSRESET_WARM:
+ value = IPCMSG_WARM_RESET;
+ break;
+ case SYSRESET_COLD:
+ value = IPCMSG_COLD_RESET;
+ break;
+ default:
+ return -ENOSYS;
+ }
+
+ scu_ipc_simple_command(value, 0);
+
+ return -EINPROGRESS;
+}
+
+static const struct udevice_id tangier_sysreset_ids[] = {
+ { .compatible = "intel,reset-tangier" },
+ { }
+};
+
+static struct sysreset_ops tangier_sysreset_ops = {
+ .request = tangier_sysreset_request,
+};
+
+U_BOOT_DRIVER(tangier_sysreset) = {
+ .name = "tangier-sysreset",
+ .id = UCLASS_SYSRESET,
+ .of_match = tangier_sysreset_ids,
+ .ops = &tangier_sysreset_ops,
+ .flags = DM_FLAG_PRE_RELOC,
+};