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| 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_RUNTIME |
| 24 | |
| 25 | static int default_platform_runtime_idle(struct device *dev) |
| 26 | { |
| 27 | /* suspend synchronously to disable clocks immediately */ |
| 28 | return pm_runtime_suspend(dev); |
| 29 | } |
| 30 | |
| 31 | static struct dev_pm_domain default_pm_domain = { |
| 32 | .ops = { |
| 33 | .runtime_suspend = pm_clk_suspend, |
| 34 | .runtime_resume = pm_clk_resume, |
| 35 | .runtime_idle = default_platform_runtime_idle, |
| 36 | USE_PLATFORM_PM_SLEEP_OPS |
| 37 | }, |
| 38 | }; |
| 39 | |
| 40 | #define DEFAULT_PM_DOMAIN_PTR (&default_pm_domain) |
| 41 | |
| 42 | #else |
| 43 | |
| 44 | #define DEFAULT_PM_DOMAIN_PTR NULL |
| 45 | |
| 46 | #endif /* CONFIG_PM_RUNTIME */ |
| 47 | |
| 48 | static struct pm_clk_notifier_block platform_bus_notifier = { |
| 49 | .pm_domain = DEFAULT_PM_DOMAIN_PTR, |
| 50 | .con_ids = { NULL, }, |
| 51 | }; |
| 52 | |
| 53 | static int __init sh_pm_runtime_init(void) |
| 54 | { |
| 55 | pm_clk_add_notifier(&platform_bus_type, &platform_bus_notifier); |
| 56 | return 0; |
| 57 | } |
| 58 | core_initcall(sh_pm_runtime_init); |
| 59 | |
| 60 | static int __init sh_pm_runtime_late_init(void) |
| 61 | { |
| 62 | pm_genpd_poweroff_unused(); |
| 63 | return 0; |
| 64 | } |
| 65 | late_initcall(sh_pm_runtime_late_init); |
| 66 |
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