sysreset_watchdog.c
1.14 KB
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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 <errno.h>
#include <sysreset.h>
#include <wdt.h>
struct wdt_reboot_priv {
struct udevice *wdt;
};
static int wdt_reboot_request(struct udevice *dev, enum sysreset_t type)
{
struct wdt_reboot_priv *priv = dev_get_priv(dev);
int ret;
ret = wdt_expire_now(priv->wdt, 0);
if (ret)
return ret;
return -EINPROGRESS;
}
static struct sysreset_ops wdt_reboot_ops = {
.request = wdt_reboot_request,
};
int wdt_reboot_probe(struct udevice *dev)
{
struct wdt_reboot_priv *priv = dev_get_priv(dev);
int err;
err = uclass_get_device_by_phandle(UCLASS_WDT, dev,
"wdt", &priv->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,
.ops = &wdt_reboot_ops,
.priv_auto_alloc_size = sizeof(struct wdt_reboot_priv),
.probe = wdt_reboot_probe,
};