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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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