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
|
/*
* Runtime PM support code for OMAP
*
* Author: Kevin Hilman, Deep Root Systems, LLC
*
* Copyright (C) 2010 Texas Instruments, Inc.
*
* This file is licensed under the terms of the GNU General Public
* License version 2. This program is licensed "as is" without any
* warranty of any kind, whether express or implied.
*/
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/io.h>
#include <linux/pm_runtime.h>
#include <linux/platform_device.h>
#include <linux/mutex.h>
#include <plat/omap_device.h>
#include <plat/omap-pm.h>
#ifdef CONFIG_PM_RUNTIME
static int omap_pm_runtime_suspend(struct device *dev)
{
struct platform_device *pdev = to_platform_device(dev);
int r, ret = 0;
dev_dbg(dev, "%s\n", __func__);
ret = pm_generic_runtime_suspend(dev);
if (!ret && dev->parent == &omap_device_parent) {
r = omap_device_idle(pdev);
WARN_ON(r);
}
return ret;
};
static int omap_pm_runtime_resume(struct device *dev)
{
struct platform_device *pdev = to_platform_device(dev);
int r;
dev_dbg(dev, "%s\n", __func__);
if (dev->parent == &omap_device_parent) {
r = omap_device_enable(pdev);
WARN_ON(r);
}
return pm_generic_runtime_resume(dev);
};
#else
#define omap_pm_runtime_suspend NULL
#define omap_pm_runtime_resume NULL
#endif /* CONFIG_PM_RUNTIME */
static int __init omap_pm_runtime_init(void)
{
const struct dev_pm_ops *pm;
struct dev_pm_ops *omap_pm;
pm = platform_bus_get_pm_ops();
if (!pm) {
pr_err("%s: unable to get dev_pm_ops from platform_bus\n",
__func__);
return -ENODEV;
}
omap_pm = kmemdup(pm, sizeof(struct dev_pm_ops), GFP_KERNEL);
if (!omap_pm) {
pr_err("%s: unable to alloc memory for new dev_pm_ops\n",
__func__);
return -ENOMEM;
}
omap_pm->runtime_suspend = omap_pm_runtime_suspend;
omap_pm->runtime_resume = omap_pm_runtime_resume;
platform_bus_set_pm_ops(omap_pm);
return 0;
}
core_initcall(omap_pm_runtime_init);
|
