This adds a generic reset driver for x86 processor.
Signed-off-by: Bin Meng <bmeng...@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...@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,
+};
--
2.7.4
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