mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-18 01:03:05 +00:00
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>
51 lines
1.2 KiB
C
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,
|
|
};
|