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
18static 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
37static 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
46static 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
54static struct pm_clk_notifier_block platform_bus_notifier = {
55	.pm_domain = &davinci_pm_domain,
56	.con_ids = { "fck", "master", "slave", NULL },
57};
58
59static int __init davinci_pm_runtime_init(void)
60{
61	pm_clk_add_notifier(&platform_bus_type, &platform_bus_notifier);
62
63	return 0;
64}
65core_initcall(davinci_pm_runtime_init);
66