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
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
|
/*
* Copyright (c) 2006-2023, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2023-02-25 GuEe-GUI the first version
*/
#include <rtthread.h>
#include <rtdevice.h>
#define DBG_TAG "reset.syscon.poweroff"
#define DBG_LVL DBG_INFO
#include <rtdbg.h>
static struct rt_syscon *syscon;
static rt_uint32_t offset, value, mask;
static void syscon_poweroff(void)
{
/* Issue the poweroff */
rt_syscon_update_bits(syscon, offset, mask, value);
rt_thread_mdelay(1000);
LOG_E("Unable to poweroff system");
}
static rt_err_t syscon_poweroff_probe(struct rt_platform_device *pdev)
{
rt_err_t mask_err, value_err;
struct rt_ofw_node *np = pdev->parent.ofw_node;
syscon = rt_syscon_find_by_ofw_phandle(np, "regmap");
if (!syscon)
{
return -RT_ERROR;
}
if (rt_ofw_prop_read_u32(np, "offset", &offset))
{
LOG_E("read '%s' fail", "offset");
return -RT_EINVAL;
}
value_err = rt_ofw_prop_read_u32(np, "value", &value);
mask_err = rt_ofw_prop_read_u32(np, "mask", &mask);
if (value_err && mask_err)
{
LOG_E("read '%s' and '%s' fail", "value", "mask");
return -RT_EINVAL;
}
if (value_err)
{
/* support old binding */
value = mask;
mask = 0xffffffff;
}
else if (mask_err)
{
/* support value without mask */
mask = 0xffffffff;
}
if (rt_dm_machine_shutdown)
{
LOG_E("rt_dm_machine_shutdown have hook %p", rt_dm_machine_shutdown);
return -RT_EBUSY;
}
rt_dm_machine_shutdown = syscon_poweroff;
return RT_EOK;
}
static const struct rt_ofw_node_id syscon_poweroff_ofw_ids[] =
{
{ .compatible = "syscon-poweroff" },
{ /* sentinel */ }
};
static struct rt_platform_driver syscon_poweroff_driver =
{
.name = "reset-syscon-poweroff",
.ids = syscon_poweroff_ofw_ids,
.probe = syscon_poweroff_probe,
};
static int syscon_poweroff_driver_register(void)
{
rt_platform_driver_register(&syscon_poweroff_driver);
return 0;
}
INIT_SUBSYS_EXPORT(syscon_poweroff_driver_register);
|
