1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright 2017 Google, Inc
11 #include <dm/device-internal.h>
14 DECLARE_GLOBAL_DATA_PTR;
16 int wdt_start(struct udevice *dev, u64 timeout_ms, ulong flags)
18 const struct wdt_ops *ops = device_get_ops(dev);
23 return ops->start(dev, timeout_ms, flags);
26 int wdt_stop(struct udevice *dev)
28 const struct wdt_ops *ops = device_get_ops(dev);
33 return ops->stop(dev);
36 int wdt_reset(struct udevice *dev)
38 const struct wdt_ops *ops = device_get_ops(dev);
43 return ops->reset(dev);
46 int wdt_expire_now(struct udevice *dev, ulong flags)
49 const struct wdt_ops *ops;
51 debug("WDT Resetting: %lu\n", flags);
52 ops = device_get_ops(dev);
53 if (ops->expire_now) {
54 return ops->expire_now(dev, flags);
59 ret = ops->start(dev, 1, flags);
69 #if defined(CONFIG_WATCHDOG)
71 * Called by macro WATCHDOG_RESET. This function be called *very* early,
72 * so we need to make sure, that the watchdog driver is ready before using
73 * it in this function.
75 void watchdog_reset(void)
77 static ulong next_reset;
80 /* Exit if GD is not ready or watchdog is not initialized yet */
81 if (!gd || !(gd->flags & GD_FLG_WDT_READY))
84 /* Do not reset the watchdog too often */
86 if (now > next_reset) {
87 next_reset = now + 1000; /* reset every 1000ms */
88 wdt_reset(gd->watchdog_dev);
93 static int wdt_post_bind(struct udevice *dev)
95 #if defined(CONFIG_NEEDS_MANUAL_RELOC)
96 struct wdt_ops *ops = (struct wdt_ops *)device_get_ops(dev);
97 static int reloc_done;
101 ops->start += gd->reloc_off;
103 ops->stop += gd->reloc_off;
105 ops->reset += gd->reloc_off;
107 ops->expire_now += gd->reloc_off;
115 UCLASS_DRIVER(wdt) = {
118 .flags = DM_UC_FLAG_SEQ_ALIAS,
119 .post_bind = wdt_post_bind,