Commit | Line | Data |
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57e6fe7b KH |
1 | /* |
2 | * Runtime PM support code for OMAP | |
3 | * | |
4 | * Author: Kevin Hilman, Deep Root Systems, LLC | |
5 | * | |
6 | * Copyright (C) 2010 Texas Instruments, Inc. | |
7 | * | |
8 | * This file is licensed under the terms of the GNU General Public | |
9 | * License version 2. This program is licensed "as is" without any | |
10 | * warranty of any kind, whether express or implied. | |
11 | */ | |
12 | #include <linux/init.h> | |
13 | #include <linux/kernel.h> | |
14 | #include <linux/io.h> | |
15 | #include <linux/pm_runtime.h> | |
16 | #include <linux/platform_device.h> | |
17 | #include <linux/mutex.h> | |
18 | ||
19 | #include <plat/omap_device.h> | |
20 | #include <plat/omap-pm.h> | |
21 | ||
22 | #ifdef CONFIG_PM_RUNTIME | |
b97c374d | 23 | static int omap_pm_runtime_suspend(struct device *dev) |
57e6fe7b KH |
24 | { |
25 | struct platform_device *pdev = to_platform_device(dev); | |
26 | int r, ret = 0; | |
27 | ||
28 | dev_dbg(dev, "%s\n", __func__); | |
29 | ||
30 | ret = pm_generic_runtime_suspend(dev); | |
31 | ||
32 | if (!ret && dev->parent == &omap_device_parent) { | |
33 | r = omap_device_idle(pdev); | |
34 | WARN_ON(r); | |
35 | } | |
36 | ||
37 | return ret; | |
38 | }; | |
39 | ||
b97c374d | 40 | static int omap_pm_runtime_resume(struct device *dev) |
57e6fe7b KH |
41 | { |
42 | struct platform_device *pdev = to_platform_device(dev); | |
43 | int r; | |
44 | ||
45 | dev_dbg(dev, "%s\n", __func__); | |
46 | ||
47 | if (dev->parent == &omap_device_parent) { | |
48 | r = omap_device_enable(pdev); | |
49 | WARN_ON(r); | |
50 | } | |
51 | ||
52 | return pm_generic_runtime_resume(dev); | |
53 | }; | |
54 | #else | |
55 | #define omap_pm_runtime_suspend NULL | |
56 | #define omap_pm_runtime_resume NULL | |
57 | #endif /* CONFIG_PM_RUNTIME */ | |
58 | ||
59 | static int __init omap_pm_runtime_init(void) | |
60 | { | |
61 | const struct dev_pm_ops *pm; | |
62 | struct dev_pm_ops *omap_pm; | |
63 | ||
64 | pm = platform_bus_get_pm_ops(); | |
65 | if (!pm) { | |
66 | pr_err("%s: unable to get dev_pm_ops from platform_bus\n", | |
67 | __func__); | |
68 | return -ENODEV; | |
69 | } | |
70 | ||
71 | omap_pm = kmemdup(pm, sizeof(struct dev_pm_ops), GFP_KERNEL); | |
72 | if (!omap_pm) { | |
73 | pr_err("%s: unable to alloc memory for new dev_pm_ops\n", | |
74 | __func__); | |
75 | return -ENOMEM; | |
76 | } | |
77 | ||
78 | omap_pm->runtime_suspend = omap_pm_runtime_suspend; | |
79 | omap_pm->runtime_resume = omap_pm_runtime_resume; | |
80 | ||
81 | platform_bus_set_pm_ops(omap_pm); | |
82 | ||
83 | return 0; | |
84 | } | |
85 | core_initcall(omap_pm_runtime_init); |