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Magnus Dammf14c4f12010-07-27 08:14:35 +00001/*
Paul Mundtd03299e2011-11-11 15:58:50 +09002 * Runtime PM support code
Magnus Dammf14c4f12010-07-27 08:14:35 +00003 *
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>
Rafael J. Wysocki79620412011-07-13 12:32:07 +020015#include <linux/pm_domain.h>
Rafael J. Wysockib5e8d262011-08-25 15:34:19 +020016#include <linux/pm_clock.h>
Magnus Dammf14c4f12010-07-27 08:14:35 +000017#include <linux/platform_device.h>
18#include <linux/clk.h>
19#include <linux/sh_clk.h>
20#include <linux/bitmap.h>
Rafael J. Wysocki1d2b71f2011-04-29 00:36:53 +020021#include <linux/slab.h>
Magnus Dammf14c4f12010-07-27 08:14:35 +000022
23#ifdef CONFIG_PM_RUNTIME
Ben Dooks8255fe12014-05-22 20:00:05 +020024static 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
Rafael J. Wysocki564b9052011-06-23 01:52:55 +020057static struct dev_pm_domain default_pm_domain = {
Rafael J. Wysocki38ade3a2011-04-29 00:36:21 +020058 .ops = {
Ben Dooks8255fe12014-05-22 20:00:05 +020059 .runtime_suspend = sh_pm_runtime_suspend,
60 .runtime_resume = sh_pm_runtime_resume,
Rafael J. Wysocki38ade3a2011-04-29 00:36:21 +020061 USE_PLATFORM_PM_SLEEP_OPS
62 },
63};
64
Rafael J. Wysocki564b9052011-06-23 01:52:55 +020065#define DEFAULT_PM_DOMAIN_PTR (&default_pm_domain)
Magnus Dammf14c4f12010-07-27 08:14:35 +000066
Rafael J. Wysocki85eb8c82011-04-30 00:25:44 +020067#else
Magnus Dammf14c4f12010-07-27 08:14:35 +000068
Rafael J. Wysocki564b9052011-06-23 01:52:55 +020069#define DEFAULT_PM_DOMAIN_PTR NULL
Magnus Dammf14c4f12010-07-27 08:14:35 +000070
71#endif /* CONFIG_PM_RUNTIME */
72
Rafael J. Wysocki85eb8c82011-04-30 00:25:44 +020073static struct pm_clk_notifier_block platform_bus_notifier = {
Rafael J. Wysocki564b9052011-06-23 01:52:55 +020074 .pm_domain = DEFAULT_PM_DOMAIN_PTR,
Rafael J. Wysocki85eb8c82011-04-30 00:25:44 +020075 .con_ids = { NULL, },
Magnus Dammf14c4f12010-07-27 08:14:35 +000076};
77
Geert Uytterhoeven3c90c552014-05-06 23:26:19 +020078static bool default_pm_on;
79
Magnus Dammf14c4f12010-07-27 08:14:35 +000080static int __init sh_pm_runtime_init(void)
81{
Geert Uytterhoeven3c90c552014-05-06 23:26:19 +020082 if (IS_ENABLED(CONFIG_ARCH_SHMOBILE_MULTI)) {
83 if (!of_machine_is_compatible("renesas,emev2") &&
84 !of_machine_is_compatible("renesas,r7s72100") &&
85 !of_machine_is_compatible("renesas,r8a73a4") &&
86 !of_machine_is_compatible("renesas,r8a7740") &&
87 !of_machine_is_compatible("renesas,r8a7778") &&
88 !of_machine_is_compatible("renesas,r8a7779") &&
89 !of_machine_is_compatible("renesas,r8a7790") &&
90 !of_machine_is_compatible("renesas,r8a7791") &&
Geert Uytterhoeven2f35fb32014-05-27 15:45:09 +020091 !of_machine_is_compatible("renesas,r8a7792") &&
92 !of_machine_is_compatible("renesas,r8a7793") &&
93 !of_machine_is_compatible("renesas,r8a7794") &&
Geert Uytterhoeven3c90c552014-05-06 23:26:19 +020094 !of_machine_is_compatible("renesas,sh7372") &&
95 !of_machine_is_compatible("renesas,sh73a0"))
96 return 0;
97 }
98
99 default_pm_on = true;
Rafael J. Wysocki3d5c3032011-07-01 22:13:44 +0200100 pm_clk_add_notifier(&platform_bus_type, &platform_bus_notifier);
Magnus Dammf14c4f12010-07-27 08:14:35 +0000101 return 0;
102}
103core_initcall(sh_pm_runtime_init);
Magnus Damm999a4d22011-07-10 10:38:34 +0200104
Magnus Damm999a4d22011-07-10 10:38:34 +0200105static int __init sh_pm_runtime_late_init(void)
106{
Geert Uytterhoeven3c90c552014-05-06 23:26:19 +0200107 if (default_pm_on)
108 pm_genpd_poweroff_unused();
Magnus Damm999a4d22011-07-10 10:38:34 +0200109 return 0;
110}
111late_initcall(sh_pm_runtime_late_init);