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Merge tag 'signed-efi-next' of git://github.com/agraf/u-boot
[u-boot] / drivers / watchdog / wdt-uclass.c
1 /*
2  * Copyright 2017 Google, Inc
3  *
4  * SPDX-License-Identifier:     GPL-2.0+
5  */
6
7 #include <common.h>
8 #include <dm.h>
9 #include <errno.h>
10 #include <wdt.h>
11 #include <dm/device-internal.h>
12 #include <dm/lists.h>
13
14 DECLARE_GLOBAL_DATA_PTR;
15
16 int wdt_start(struct udevice *dev, u64 timeout_ms, ulong flags)
17 {
18         const struct wdt_ops *ops = device_get_ops(dev);
19
20         if (!ops->start)
21                 return -ENOSYS;
22
23         return ops->start(dev, timeout_ms, flags);
24 }
25
26 int wdt_stop(struct udevice *dev)
27 {
28         const struct wdt_ops *ops = device_get_ops(dev);
29
30         if (!ops->stop)
31                 return -ENOSYS;
32
33         return ops->stop(dev);
34 }
35
36 int wdt_reset(struct udevice *dev)
37 {
38         const struct wdt_ops *ops = device_get_ops(dev);
39
40         if (!ops->reset)
41                 return -ENOSYS;
42
43         return ops->reset(dev);
44 }
45
46 int wdt_expire_now(struct udevice *dev, ulong flags)
47 {
48         int ret = 0;
49         const struct wdt_ops *ops;
50
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);
55         } else {
56                 if (!ops->start)
57                         return -ENOSYS;
58
59                 ret = ops->start(dev, 1, flags);
60                 if (ret < 0)
61                         return ret;
62
63                 hang();
64         }
65
66         return ret;
67 }
68
69 UCLASS_DRIVER(wdt) = {
70         .id             = UCLASS_WDT,
71         .name           = "wdt",
72 };