1*4882a593Smuzhiyun /*
2*4882a593Smuzhiyun * Copyright 2017 Google, Inc
3*4882a593Smuzhiyun *
4*4882a593Smuzhiyun * SPDX-License-Identifier: GPL-2.0+
5*4882a593Smuzhiyun */
6*4882a593Smuzhiyun
7*4882a593Smuzhiyun #include <common.h>
8*4882a593Smuzhiyun #include <dm.h>
9*4882a593Smuzhiyun #include <wdt.h>
10*4882a593Smuzhiyun #include <asm/state.h>
11*4882a593Smuzhiyun
12*4882a593Smuzhiyun DECLARE_GLOBAL_DATA_PTR;
13*4882a593Smuzhiyun
sandbox_wdt_start(struct udevice * dev,u64 timeout,ulong flags)14*4882a593Smuzhiyun static int sandbox_wdt_start(struct udevice *dev, u64 timeout, ulong flags)
15*4882a593Smuzhiyun {
16*4882a593Smuzhiyun struct sandbox_state *state = state_get_current();
17*4882a593Smuzhiyun
18*4882a593Smuzhiyun state->wdt.counter = timeout;
19*4882a593Smuzhiyun state->wdt.running = true;
20*4882a593Smuzhiyun
21*4882a593Smuzhiyun return 0;
22*4882a593Smuzhiyun }
23*4882a593Smuzhiyun
sandbox_wdt_stop(struct udevice * dev)24*4882a593Smuzhiyun static int sandbox_wdt_stop(struct udevice *dev)
25*4882a593Smuzhiyun {
26*4882a593Smuzhiyun struct sandbox_state *state = state_get_current();
27*4882a593Smuzhiyun
28*4882a593Smuzhiyun state->wdt.running = false;
29*4882a593Smuzhiyun
30*4882a593Smuzhiyun return 0;
31*4882a593Smuzhiyun }
32*4882a593Smuzhiyun
sandbox_wdt_reset(struct udevice * dev)33*4882a593Smuzhiyun static int sandbox_wdt_reset(struct udevice *dev)
34*4882a593Smuzhiyun {
35*4882a593Smuzhiyun struct sandbox_state *state = state_get_current();
36*4882a593Smuzhiyun
37*4882a593Smuzhiyun state->wdt.reset_count++;
38*4882a593Smuzhiyun
39*4882a593Smuzhiyun return 0;
40*4882a593Smuzhiyun }
41*4882a593Smuzhiyun
sandbox_wdt_expire_now(struct udevice * dev,ulong flags)42*4882a593Smuzhiyun static int sandbox_wdt_expire_now(struct udevice *dev, ulong flags)
43*4882a593Smuzhiyun {
44*4882a593Smuzhiyun sandbox_wdt_start(dev, 1, flags);
45*4882a593Smuzhiyun
46*4882a593Smuzhiyun return 0;
47*4882a593Smuzhiyun }
48*4882a593Smuzhiyun
49*4882a593Smuzhiyun static const struct wdt_ops sandbox_wdt_ops = {
50*4882a593Smuzhiyun .start = sandbox_wdt_start,
51*4882a593Smuzhiyun .reset = sandbox_wdt_reset,
52*4882a593Smuzhiyun .stop = sandbox_wdt_stop,
53*4882a593Smuzhiyun .expire_now = sandbox_wdt_expire_now,
54*4882a593Smuzhiyun };
55*4882a593Smuzhiyun
56*4882a593Smuzhiyun static const struct udevice_id sandbox_wdt_ids[] = {
57*4882a593Smuzhiyun { .compatible = "sandbox,wdt" },
58*4882a593Smuzhiyun {}
59*4882a593Smuzhiyun };
60*4882a593Smuzhiyun
61*4882a593Smuzhiyun U_BOOT_DRIVER(wdt_sandbox) = {
62*4882a593Smuzhiyun .name = "wdt_sandbox",
63*4882a593Smuzhiyun .id = UCLASS_WDT,
64*4882a593Smuzhiyun .of_match = sandbox_wdt_ids,
65*4882a593Smuzhiyun .ops = &sandbox_wdt_ops,
66*4882a593Smuzhiyun };
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