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ce9dcb87 KH |
1 | /* |
2 | * Runtime PM support code for DaVinci | |
3 | * | |
4 | * Author: Kevin Hilman | |
5 | * | |
6 | * Copyright (C) 2012 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/pm_runtime.h> | |
14 | #include <linux/pm_clock.h> | |
15 | #include <linux/platform_device.h> | |
16 | ||
17 | #ifdef CONFIG_PM_RUNTIME | |
18 | static int davinci_pm_runtime_suspend(struct device *dev) | |
19 | { | |
20 | int ret; | |
21 | ||
22 | dev_dbg(dev, "%s\n", __func__); | |
23 | ||
24 | ret = pm_generic_runtime_suspend(dev); | |
25 | if (ret) | |
26 | return ret; | |
27 | ||
28 | ret = pm_clk_suspend(dev); | |
29 | if (ret) { | |
30 | pm_generic_runtime_resume(dev); | |
31 | return ret; | |
32 | } | |
33 | ||
34 | return 0; | |
35 | } | |
36 | ||
37 | static int davinci_pm_runtime_resume(struct device *dev) | |
38 | { | |
39 | dev_dbg(dev, "%s\n", __func__); | |
40 | ||
41 | pm_clk_resume(dev); | |
42 | return pm_generic_runtime_resume(dev); | |
43 | } | |
44 | #endif | |
45 | ||
46 | static struct dev_pm_domain davinci_pm_domain = { | |
47 | .ops = { | |
48 | SET_RUNTIME_PM_OPS(davinci_pm_runtime_suspend, | |
49 | davinci_pm_runtime_resume, NULL) | |
50 | USE_PLATFORM_PM_SLEEP_OPS | |
51 | }, | |
52 | }; | |
53 | ||
54 | static struct pm_clk_notifier_block platform_bus_notifier = { | |
55 | .pm_domain = &davinci_pm_domain, | |
9a3e89b1 | 56 | .con_ids = { "fck", "master", "slave", NULL }, |
ce9dcb87 KH |
57 | }; |
58 | ||
59 | static int __init davinci_pm_runtime_init(void) | |
60 | { | |
61 | pm_clk_add_notifier(&platform_bus_type, &platform_bus_notifier); | |
62 | ||
63 | return 0; | |
64 | } | |
65 | core_initcall(davinci_pm_runtime_init); |