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
|
/* Copyright (c) 2013, The Linux Foundation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
* only version 2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
*/
#include <linux/delay.h>
#include <linux/err.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/io.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/module.h>
#include <linux/reboot.h>
#include <linux/pm.h>
static void __iomem *msm_ps_hold;
static int do_msm_restart(struct notifier_block *nb, unsigned long action,
void *data)
{
writel(0, msm_ps_hold);
mdelay(10000);
return NOTIFY_DONE;
}
static struct notifier_block restart_nb = {
.notifier_call = do_msm_restart,
.priority = 128,
};
static void do_msm_poweroff(void)
{
/* TODO: Add poweroff capability */
do_msm_restart(&restart_nb, 0, NULL);
}
static int msm_restart_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct resource *mem;
mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
msm_ps_hold = devm_ioremap_resource(dev, mem);
if (IS_ERR(msm_ps_hold))
return PTR_ERR(msm_ps_hold);
register_restart_handler(&restart_nb);
pm_power_off = do_msm_poweroff;
return 0;
}
static const struct of_device_id of_msm_restart_match[] = {
{ .compatible = "qcom,pshold", },
{},
};
MODULE_DEVICE_TABLE(of, of_msm_restart_match);
static struct platform_driver msm_restart_driver = {
.probe = msm_restart_probe,
.driver = {
.name = "msm-restart",
.of_match_table = of_match_ptr(of_msm_restart_match),
},
};
static int __init msm_restart_init(void)
{
return platform_driver_register(&msm_restart_driver);
}
device_initcall(msm_restart_init);
|
