1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
|
// SPDX-License-Identifier: GPL-2.0-only
#include <common.h>
#include <errno.h>
#include <driver.h>
#include <mach/linux.h>
#include <of.h>
#include <watchdog.h>
#include <mfd/syscon.h>
#include <reset_source.h>
struct sandbox_watchdog {
struct watchdog wdd;
bool cant_disable :1;
};
static inline struct sandbox_watchdog *to_sandbox_watchdog(struct watchdog *wdd)
{
return container_of(wdd, struct sandbox_watchdog, wdd);
}
static int sandbox_watchdog_set_timeout(struct watchdog *wdd, unsigned int timeout)
{
struct sandbox_watchdog *wd = to_sandbox_watchdog(wdd);
if (!timeout && wd->cant_disable)
return -ENOSYS;
if (timeout > wdd->timeout_max)
return -EINVAL;
linux_watchdog_set_timeout(timeout);
return 0;
}
static int sandbox_watchdog_probe(struct device_d *dev)
{
struct device_node *np = dev->device_node;
struct sandbox_watchdog *wd;
struct watchdog *wdd;
struct regmap *src;
u32 src_offset;
int ret;
wd = xzalloc(sizeof(*wd));
wdd = &wd->wdd;
wdd->hwdev = dev;
wdd->set_timeout = sandbox_watchdog_set_timeout;
wdd->timeout_max = 1000;
wd->cant_disable = of_property_read_bool(np, "barebox,cant-disable");
ret = watchdog_register(wdd);
if (ret) {
dev_err(dev, "Failed to register watchdog device\n");
return ret;
}
src = syscon_regmap_lookup_by_phandle(np, "barebox,reset-source");
if (IS_ERR(src))
return 0;
ret = of_property_read_u32_index(np, "barebox,reset-source", 1, &src_offset);
if (ret)
return 0;
regmap_update_bits(src, src_offset, 0xff, RESET_WDG);
dev_info(dev, "probed\n");
return 0;
}
static __maybe_unused struct of_device_id sandbox_watchdog_dt_ids[] = {
{ .compatible = "barebox,sandbox-watchdog" },
{ /* sentinel */ }
};
static struct driver_d sandbox_watchdog_drv = {
.name = "sandbox-watchdog",
.of_compatible = sandbox_watchdog_dt_ids,
.probe = sandbox_watchdog_probe,
};
device_platform_driver(sandbox_watchdog_drv);
|
