1 files changed, 49 insertions, 0 deletions
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,
+};