This adds a generic reset driver for x86 processor.
Signed-off-by: Bin Meng bmeng.cn@gmail.com ---
drivers/sysreset/Kconfig | 6 +++++ drivers/sysreset/Makefile | 1 + drivers/sysreset/sysreset_x86.c | 49 +++++++++++++++++++++++++++++++++++++++++ 3 files changed, 56 insertions(+) create mode 100644 drivers/sysreset/sysreset_x86.c
diff --git a/drivers/sysreset/Kconfig b/drivers/sysreset/Kconfig index a6d48e8..2afeadc 100644 --- a/drivers/sysreset/Kconfig +++ b/drivers/sysreset/Kconfig @@ -37,4 +37,10 @@ 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 0da58a1..0eb0dc7 100644 --- a/drivers/sysreset/Makefile +++ b/drivers/sysreset/Makefile @@ -6,6 +6,7 @@ obj-$(CONFIG_SYSRESET) += sysreset-uclass.o obj-$(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 0000000..5943a63 --- /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, +};