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// 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,
};
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