1/*
2 * Runtime PM support code
3 *
4 *  Copyright (C) 2009-2010 Magnus Damm
5 *
6 * This file is subject to the terms and conditions of the GNU General Public
7 * License.  See the file "COPYING" in the main directory of this archive
8 * for more details.
9 */
10
11#include <linux/init.h>
12#include <linux/kernel.h>
13#include <linux/io.h>
14#include <linux/pm_runtime.h>
15#include <linux/pm_domain.h>
16#include <linux/pm_clock.h>
17#include <linux/platform_device.h>
18#include <linux/clk.h>
19#include <linux/sh_clk.h>
20#include <linux/bitmap.h>
21#include <linux/slab.h>
22
23#ifdef CONFIG_PM
24static int sh_pm_runtime_suspend(struct device *dev)
25{
26	int ret;
27
28	ret = pm_generic_runtime_suspend(dev);
29	if (ret) {
30		dev_err(dev, "failed to suspend device\n");
31		return ret;
32	}
33
34	ret = pm_clk_suspend(dev);
35	if (ret) {
36		dev_err(dev, "failed to suspend clock\n");
37		pm_generic_runtime_resume(dev);
38		return ret;
39	}
40
41	return 0;
42}
43
44static int sh_pm_runtime_resume(struct device *dev)
45{
46	int ret;
47
48	ret = pm_clk_resume(dev);
49	if (ret) {
50		dev_err(dev, "failed to resume clock\n");
51		return ret;
52	}
53
54	return pm_generic_runtime_resume(dev);
55}
56
57static struct dev_pm_domain default_pm_domain = {
58	.ops = {
59		.runtime_suspend = sh_pm_runtime_suspend,
60		.runtime_resume = sh_pm_runtime_resume,
61		USE_PLATFORM_PM_SLEEP_OPS
62	},
63};
64
65#define DEFAULT_PM_DOMAIN_PTR	(&default_pm_domain)
66
67#else
68
69#define DEFAULT_PM_DOMAIN_PTR	NULL
70
71#endif /* CONFIG_PM */
72
73static struct pm_clk_notifier_block platform_bus_notifier = {
74	.pm_domain = DEFAULT_PM_DOMAIN_PTR,
75	.con_ids = { NULL, },
76};
77
78static int __init sh_pm_runtime_init(void)
79{
80	if (IS_ENABLED(CONFIG_ARCH_SHMOBILE_MULTI)) {
81		if (!of_machine_is_compatible("renesas,emev2") &&
82		    !of_machine_is_compatible("renesas,r7s72100") &&
83#ifndef CONFIG_PM_GENERIC_DOMAINS_OF
84		    !of_machine_is_compatible("renesas,r8a73a4") &&
85		    !of_machine_is_compatible("renesas,r8a7740") &&
86		    !of_machine_is_compatible("renesas,sh73a0") &&
87#endif
88		    !of_machine_is_compatible("renesas,r8a7778") &&
89		    !of_machine_is_compatible("renesas,r8a7779") &&
90		    !of_machine_is_compatible("renesas,r8a7790") &&
91		    !of_machine_is_compatible("renesas,r8a7791") &&
92		    !of_machine_is_compatible("renesas,r8a7792") &&
93		    !of_machine_is_compatible("renesas,r8a7793") &&
94		    !of_machine_is_compatible("renesas,r8a7794"))
95			return 0;
96	}
97
98	pm_clk_add_notifier(&platform_bus_type, &platform_bus_notifier);
99	return 0;
100}
101core_initcall(sh_pm_runtime_init);
102