diff options
| author | Bin Meng <bmeng.cn@gmail.com> | 2018-07-03 02:48:40 -0700 |
|---|---|---|
| committer | Bin Meng <bmeng.cn@gmail.com> | 2018-07-20 09:33:22 +0800 |
| commit | fabb2b4c7f28e672080a97980c4bb1a45375cbb3 (patch) | |
| tree | eee8a9f8f64fd6265b3da15a3bb212755f58769d | |
| parent | 1ac10ab9d73ea8d39dc93fbf8f993267ec8f9041 (diff) | |
dm: sysreset: x86: Add a sysreset driver
This adds a generic reset driver for x86 processor.
Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
| -rw-r--r-- | drivers/sysreset/Kconfig | 6 | ||||
| -rw-r--r-- | drivers/sysreset/Makefile | 1 | ||||
| -rw-r--r-- | drivers/sysreset/sysreset_x86.c | 49 |
3 files changed, 56 insertions, 0 deletions
diff --git a/drivers/sysreset/Kconfig b/drivers/sysreset/Kconfig index f2524c18b7..9b2fda4d25 100644 --- a/drivers/sysreset/Kconfig +++ b/drivers/sysreset/Kconfig @@ -51,4 +51,10 @@ config SYSRESET_WATCHDOG help Reboot support for generic watchdog reset. +config SYSRESET_X86 + bool "Enable support for x86 processor reboot driver" + depends on X86 + help + Reboot support for generic x86 processor reset. + endmenu diff --git a/drivers/sysreset/Makefile b/drivers/sysreset/Makefile index 223a0716f0..707f1d7469 100644 --- a/drivers/sysreset/Makefile +++ b/drivers/sysreset/Makefile @@ -8,6 +8,7 @@ obj-$(CONFIG_SYSRESET_MICROBLAZE) += sysreset_microblaze.o obj-$(CONFIG_SYSRESET_PSCI) += sysreset_psci.o obj-$(CONFIG_SYSRESET_SYSCON) += sysreset_syscon.o obj-$(CONFIG_SYSRESET_WATCHDOG) += sysreset_watchdog.o +obj-$(CONFIG_SYSRESET_X86) += sysreset_x86.o obj-$(CONFIG_ARCH_ROCKCHIP) += sysreset_rockchip.o obj-$(CONFIG_SANDBOX) += sysreset_sandbox.o obj-$(CONFIG_ARCH_STI) += sysreset_sti.o diff --git a/drivers/sysreset/sysreset_x86.c b/drivers/sysreset/sysreset_x86.c new file mode 100644 index 0000000000..5943a63854 --- /dev/null +++ b/drivers/sysreset/sysreset_x86.c @@ -0,0 +1,49 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright (C) 2018, Bin Meng <bmeng.cn@gmail.com> + * + * Generic reset driver for x86 processor + */ + +#include <common.h> +#include <dm.h> +#include <sysreset.h> +#include <asm/io.h> +#include <asm/processor.h> + +static int x86_sysreset_request(struct udevice *dev, enum sysreset_t type) +{ + int value; + + switch (type) { + case SYSRESET_WARM: + value = SYS_RST | RST_CPU; + break; + case SYSRESET_COLD: + value = SYS_RST | RST_CPU | FULL_RST; + break; + default: + return -ENOSYS; + } + + outb(value, IO_PORT_RESET); + + return -EINPROGRESS; +} + +static const struct udevice_id x86_sysreset_ids[] = { + { .compatible = "x86,reset" }, + { } +}; + +static struct sysreset_ops x86_sysreset_ops = { + .request = x86_sysreset_request, +}; + +U_BOOT_DRIVER(x86_sysreset) = { + .name = "x86-sysreset", + .id = UCLASS_SYSRESET, + .of_match = x86_sysreset_ids, + .ops = &x86_sysreset_ops, + .flags = DM_FLAG_PRE_RELOC, +}; |