24ed5317d4
Provide sysreset driver using the SBI system reset extension. Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com> Reviewed-by: Sean Anderson <seanga2@gmail.com> Reviewed-by: Bin Meng <bmeng.cn@gmail.com> Tested-by: Samuel Holland <samuel@sholland.org>
52 lines
1.2 KiB
C
52 lines
1.2 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright 2021, Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
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*/
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#include <common.h>
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#include <dm.h>
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#include <errno.h>
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#include <log.h>
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#include <sysreset.h>
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#include <asm/sbi.h>
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static enum sbi_srst_reset_type reset_type_map[SYSRESET_COUNT] = {
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[SYSRESET_WARM] = SBI_SRST_RESET_TYPE_WARM_REBOOT,
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[SYSRESET_COLD] = SBI_SRST_RESET_TYPE_COLD_REBOOT,
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[SYSRESET_POWER] = SBI_SRST_RESET_TYPE_COLD_REBOOT,
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[SYSRESET_POWER_OFF] = SBI_SRST_RESET_TYPE_SHUTDOWN,
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};
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static int sbi_sysreset_request(struct udevice *dev, enum sysreset_t type)
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{
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enum sbi_srst_reset_type reset_type;
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reset_type = reset_type_map[type];
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sbi_srst_reset(reset_type, SBI_SRST_RESET_REASON_NONE);
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return -EINPROGRESS;
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}
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static int sbi_sysreset_probe(struct udevice *dev)
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{
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long have_reset;
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have_reset = sbi_probe_extension(SBI_EXT_SRST);
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if (have_reset)
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return 0;
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log_warning("SBI has no system reset extension\n");
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return -ENOENT;
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}
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static struct sysreset_ops sbi_sysreset_ops = {
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.request = sbi_sysreset_request,
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};
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U_BOOT_DRIVER(sbi_sysreset) = {
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.name = "sbi-sysreset",
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.id = UCLASS_SYSRESET,
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.ops = &sbi_sysreset_ops,
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.probe = sbi_sysreset_probe,
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};
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