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| author | Magnus Damm <damm@igel.co.jp> | 2009-08-20 20:25:32 +0200 |
|---|---|---|
| committer | Rafael J. Wysocki <rjw@sisk.pl> | 2009-08-23 00:05:31 +0200 |
| commit | 9d7302299ee96ca954fe4ab8ca640333b6e19ad0 (patch) | |
| tree | 6694cfef0d50e53841af9b0954831c03f136af20 /drivers/base/platform.c | |
| parent | PM: Introduce core framework for run-time PM of I/O devices (rev. 17) (diff) | |
| download | linux-9d7302299ee96ca954fe4ab8ca640333b6e19ad0.tar.xz linux-9d7302299ee96ca954fe4ab8ca640333b6e19ad0.zip | |
PM: Run-time PM platform device bus support
This patch adds default Runtime PM callbacks to the dev_pm_ops
belonging to the platform bus. The callbacks are weak symbols
that architecture specific code can override.
Allows Runtime PM even though CONFIG_PM_SLEEP=n.
Signed-off-by: Magnus Damm <damm@igel.co.jp>
Acked-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Diffstat (limited to 'drivers/base/platform.c')
| -rw-r--r-- | drivers/base/platform.c | 46 |
1 files changed, 37 insertions, 9 deletions
diff --git a/drivers/base/platform.c b/drivers/base/platform.c index d28c289e4a3f..0f7d434ce983 100644 --- a/drivers/base/platform.c +++ b/drivers/base/platform.c @@ -17,6 +17,7 @@ #include <linux/bootmem.h> #include <linux/err.h> #include <linux/slab.h> +#include <linux/pm_runtime.h> #include "base.h" @@ -656,6 +657,13 @@ static void platform_pm_complete(struct device *dev) drv->pm->complete(dev); } +#else /* !CONFIG_PM_SLEEP */ + +#define platform_pm_prepare NULL +#define platform_pm_complete NULL + +#endif /* !CONFIG_PM_SLEEP */ + #ifdef CONFIG_SUSPEND static int platform_pm_suspend(struct device *dev) @@ -886,6 +894,31 @@ static int platform_pm_restore_noirq(struct device *dev) #endif /* !CONFIG_HIBERNATION */ +#ifdef CONFIG_PM_RUNTIME + +int __weak platform_pm_runtime_suspend(struct device *dev) +{ + return -ENOSYS; +}; + +int __weak platform_pm_runtime_resume(struct device *dev) +{ + return -ENOSYS; +}; + +int __weak platform_pm_runtime_idle(struct device *dev) +{ + return -ENOSYS; +}; + +#else /* !CONFIG_PM_RUNTIME */ + +#define platform_pm_runtime_suspend NULL +#define platform_pm_runtime_resume NULL +#define platform_pm_runtime_idle NULL + +#endif /* !CONFIG_PM_RUNTIME */ + static const struct dev_pm_ops platform_dev_pm_ops = { .prepare = platform_pm_prepare, .complete = platform_pm_complete, @@ -901,22 +934,17 @@ static const struct dev_pm_ops platform_dev_pm_ops = { .thaw_noirq = platform_pm_thaw_noirq, .poweroff_noirq = platform_pm_poweroff_noirq, .restore_noirq = platform_pm_restore_noirq, + .runtime_suspend = platform_pm_runtime_suspend, + .runtime_resume = platform_pm_runtime_resume, + .runtime_idle = platform_pm_runtime_idle, }; -#define PLATFORM_PM_OPS_PTR (&platform_dev_pm_ops) - -#else /* !CONFIG_PM_SLEEP */ - -#define PLATFORM_PM_OPS_PTR NULL - -#endif /* !CONFIG_PM_SLEEP */ - struct bus_type platform_bus_type = { .name = "platform", .dev_attrs = platform_dev_attrs, .match = platform_match, .uevent = platform_uevent, - .pm = PLATFORM_PM_OPS_PTR, + .pm = &platform_dev_pm_ops, }; EXPORT_SYMBOL_GPL(platform_bus_type); |