u-boot/drivers/sysreset/sysreset_sbi.c
Heinrich Schuchardt 24ed5317d4 sysreset: provide SBI based sysreset driver
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>
2021-10-07 16:08:23 +08:00

51 lines
1.2 KiB
C

// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright 2021, Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
*/
#include <common.h>
#include <dm.h>
#include <errno.h>
#include <log.h>
#include <sysreset.h>
#include <asm/sbi.h>
static enum sbi_srst_reset_type reset_type_map[SYSRESET_COUNT] = {
[SYSRESET_WARM] = SBI_SRST_RESET_TYPE_WARM_REBOOT,
[SYSRESET_COLD] = SBI_SRST_RESET_TYPE_COLD_REBOOT,
[SYSRESET_POWER] = SBI_SRST_RESET_TYPE_COLD_REBOOT,
[SYSRESET_POWER_OFF] = SBI_SRST_RESET_TYPE_SHUTDOWN,
};
static int sbi_sysreset_request(struct udevice *dev, enum sysreset_t type)
{
enum sbi_srst_reset_type reset_type;
reset_type = reset_type_map[type];
sbi_srst_reset(reset_type, SBI_SRST_RESET_REASON_NONE);
return -EINPROGRESS;
}
static int sbi_sysreset_probe(struct udevice *dev)
{
long have_reset;
have_reset = sbi_probe_extension(SBI_EXT_SRST);
if (have_reset)
return 0;
log_warning("SBI has no system reset extension\n");
return -ENOENT;
}
static struct sysreset_ops sbi_sysreset_ops = {
.request = sbi_sysreset_request,
};
U_BOOT_DRIVER(sbi_sysreset) = {
.name = "sbi-sysreset",
.id = UCLASS_SYSRESET,
.ops = &sbi_sysreset_ops,
.probe = sbi_sysreset_probe,
};