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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2017 Álvaro Fernández Rojas <noltari@gmail.com>
*/
#include <common.h>
#include <dm.h>
#include <dm/device-internal.h>
#include <errno.h>
#include <malloc.h>
#include <sysreset.h>
#include <wdt.h>
struct wdt_reboot_plat {
struct udevice *wdt;
};
static int wdt_reboot_request(struct udevice *dev, enum sysreset_t type)
{
struct wdt_reboot_plat *plat = dev_get_plat(dev);
int ret;
switch (type) {
case SYSRESET_COLD:
case SYSRESET_WARM:
ret = wdt_expire_now(plat->wdt, 0);
if (ret)
return ret;
break;
default:
return -ENOSYS;
}
return -EINPROGRESS;
}
static struct sysreset_ops wdt_reboot_ops = {
.request = wdt_reboot_request,
};
static int wdt_reboot_of_to_plat(struct udevice *dev)
{
struct wdt_reboot_plat *plat = dev_get_plat(dev);
int err;
err = uclass_get_device_by_phandle(UCLASS_WDT, dev,
"wdt", &plat->wdt);
if (err) {
pr_err("unable to find wdt device\n");
return err;
}
return 0;
}
static const struct udevice_id wdt_reboot_ids[] = {
{ .compatible = "wdt-reboot" },
{ /* sentinel */ }
};
U_BOOT_DRIVER(wdt_reboot) = {
.name = "wdt_reboot",
.id = UCLASS_SYSRESET,
.of_match = wdt_reboot_ids,
.of_to_plat = wdt_reboot_of_to_plat,
.plat_auto = sizeof(struct wdt_reboot_plat),
.ops = &wdt_reboot_ops,
};
#if IS_ENABLED(CONFIG_SYSRESET_WATCHDOG_AUTO)
int sysreset_register_wdt(struct udevice *dev)
{
struct wdt_reboot_plat *plat = malloc(sizeof(*plat));
int ret;
if (!plat)
return -ENOMEM;
plat->wdt = dev;
ret = device_bind(dev, DM_DRIVER_GET(wdt_reboot),
dev->name, plat, ofnode_null(), NULL);
if (ret) {
free(plat);
return ret;
}
return 0;
}
#endif
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