projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| f14c4f14 | 1 | /* |
| d03299ee | 2 | * Runtime PM support code |
| f14c4f14 MD |
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> | |
| 79620414 | 15 | #include <linux/pm_domain.h> |
| b5e8d269 | 16 | #include <linux/pm_clock.h> |
| f14c4f14 MD |
17 | #include <linux/platform_device.h> |
| 18 | #include <linux/clk.h> | |
| 19 | #include <linux/sh_clk.h> | |
| 20 | #include <linux/bitmap.h> | |
| 1d2b71f6 | 21 | #include <linux/slab.h> |
| f14c4f14 | 22 | |
| 300be5b9 | 23 | #ifdef CONFIG_PM |
| 8255fe16 BD |
24 | static 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 | ||
| 44 | static 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 | ||
| 564b905a | 57 | static struct dev_pm_domain default_pm_domain = { |
| 38ade3a1 | 58 | .ops = { |
| 8255fe16 BD |
59 | .runtime_suspend = sh_pm_runtime_suspend, |
| 60 | .runtime_resume = sh_pm_runtime_resume, | |
| 38ade3a1 RW |
61 | USE_PLATFORM_PM_SLEEP_OPS |
| 62 | }, | |
| 63 | }; | |
| 64 | ||
| 564b905a | 65 | #define DEFAULT_PM_DOMAIN_PTR (&default_pm_domain) |
| 1d2b71f6 | 66 | |
| 85eb8c8d | 67 | #else |
| f14c4f14 | 68 | |
| 564b905a | 69 | #define DEFAULT_PM_DOMAIN_PTR NULL |
| f14c4f14 | 70 | |
| 300be5b9 | 71 | #endif /* CONFIG_PM */ |
| f14c4f14 | 72 | |
| 85eb8c8d | 73 | static struct pm_clk_notifier_block platform_bus_notifier = { |
| 564b905a | 74 | .pm_domain = DEFAULT_PM_DOMAIN_PTR, |
| 85eb8c8d | 75 | .con_ids = { NULL, }, |
| f14c4f14 MD |
76 | }; |
| 77 | ||
| 78 | static int __init sh_pm_runtime_init(void) | |
| 79 | { | |
| 3c90c55d GU |
80 | if (IS_ENABLED(CONFIG_ARCH_SHMOBILE_MULTI)) { |
| 81 | if (!of_machine_is_compatible("renesas,emev2") && | |
| 82 | !of_machine_is_compatible("renesas,r7s72100") && | |
| a5cb514f | 83 | #ifndef CONFIG_PM_GENERIC_DOMAINS_OF |
| 230f259f | 84 | !of_machine_is_compatible("renesas,r8a73a4") && |
| 3c90c55d | 85 | !of_machine_is_compatible("renesas,r8a7740") && |
| 41b4b3bc | 86 | !of_machine_is_compatible("renesas,sh73a0") && |
| a5cb514f | 87 | #endif |
| 3c90c55d GU |
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") && | |
| 2f35fb3c GU |
92 | !of_machine_is_compatible("renesas,r8a7792") && |
| 93 | !of_machine_is_compatible("renesas,r8a7793") && | |
| 00170528 | 94 | !of_machine_is_compatible("renesas,r8a7794")) |
| 3c90c55d GU |
95 | return 0; |
| 96 | } | |
| 97 | ||
| 3d5c3036 | 98 | pm_clk_add_notifier(&platform_bus_type, &platform_bus_notifier); |
| f14c4f14 MD |
99 | return 0; |
| 100 | } | |
| 101 | core_initcall(sh_pm_runtime_init); |