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https://github.com/brain-hackers/u-boot-brain
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fabb2b4c7f
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>
50 lines
924 B
C
50 lines
924 B
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2018, Bin Meng <bmeng.cn@gmail.com>
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*
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* Generic reset driver for x86 processor
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*/
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#include <common.h>
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#include <dm.h>
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#include <sysreset.h>
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#include <asm/io.h>
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#include <asm/processor.h>
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static int x86_sysreset_request(struct udevice *dev, enum sysreset_t type)
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{
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int value;
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switch (type) {
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case SYSRESET_WARM:
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value = SYS_RST | RST_CPU;
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break;
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case SYSRESET_COLD:
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value = SYS_RST | RST_CPU | FULL_RST;
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break;
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default:
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return -ENOSYS;
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}
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outb(value, IO_PORT_RESET);
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return -EINPROGRESS;
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}
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static const struct udevice_id x86_sysreset_ids[] = {
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{ .compatible = "x86,reset" },
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{ }
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};
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static struct sysreset_ops x86_sysreset_ops = {
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.request = x86_sysreset_request,
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};
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U_BOOT_DRIVER(x86_sysreset) = {
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.name = "x86-sysreset",
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.id = UCLASS_SYSRESET,
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.of_match = x86_sysreset_ids,
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.ops = &x86_sysreset_ops,
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.flags = DM_FLAG_PRE_RELOC,
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};
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