1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * Copyright (C) 2017 lvaro Fernndez Rojas <noltari (at) gmail.com> 4 */ 5 6 #include <common.h> 7 #include <dm.h> 8 #include <errno.h> 9 #include <sysreset.h> 10 #include <wdt.h> 11 12 struct wdt_reboot_priv { 13 struct udevice *wdt; 14 }; 15 16 static int wdt_reboot_request(struct udevice *dev, enum sysreset_t type) 17 { 18 struct wdt_reboot_priv *priv = dev_get_priv(dev); 19 int ret; 20 21 ret = wdt_expire_now(priv->wdt, 0); 22 if (ret) 23 return ret; 24 25 return -EINPROGRESS; 26 } 27 28 static struct sysreset_ops wdt_reboot_ops = { 29 .request = wdt_reboot_request, 30 }; 31 32 int wdt_reboot_probe(struct udevice *dev) 33 { 34 struct wdt_reboot_priv *priv = dev_get_priv(dev); 35 int err; 36 37 err = uclass_get_device_by_phandle(UCLASS_WDT, dev, 38 "wdt", &priv->wdt); 39 if (err) { 40 pr_err("unable to find wdt device\n"); 41 return err; 42 } 43 44 return 0; 45 } 46 47 static const struct udevice_id wdt_reboot_ids[] = { 48 { .compatible = "wdt-reboot" }, 49 { /* sentinel */ } 50 }; 51 52 U_BOOT_DRIVER(wdt_reboot) = { 53 .name = "wdt_reboot", 54 .id = UCLASS_SYSRESET, 55 .of_match = wdt_reboot_ids, 56 .ops = &wdt_reboot_ops, 57 .priv_auto_alloc_size = sizeof(struct wdt_reboot_priv), 58 .probe = wdt_reboot_probe, 59 }; 60
