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PM / Runtime: Generic clock manipulation rountines for runtime PM (v6)

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Many different platforms and subsystems may want to disable device
clocks during suspend and enable them during resume which is going to
be done in a very similar way in all those cases.  For this reason,
provide generic routines for the manipulation of device clocks during
suspend and resume.

Convert the ARM shmobile platform to using the new routines.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
This commit is contained in:
Rafael J. Wysocki
2011-04-30 00:25:44 +02:00
parent 1d2b71f61b
commit 85eb8c8d0b
5 changed files with 486 additions and 131 deletions
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42
include/linux/pm_runtime.h
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@@ -245,4 +245,46 @@ static inline void pm_runtime_dont_use_autosuspend(struct device *dev)
__pm_runtime_use_autosuspend(dev, false);
}
struct pm_clk_notifier_block {
struct notifier_block nb;
struct dev_power_domain *pwr_domain;
char *con_ids[];
};
#ifdef CONFIG_PM_RUNTIME_CLK
extern int pm_runtime_clk_init(struct device *dev);
extern void pm_runtime_clk_destroy(struct device *dev);
extern int pm_runtime_clk_add(struct device *dev, const char *con_id);
extern void pm_runtime_clk_remove(struct device *dev, const char *con_id);
extern int pm_runtime_clk_suspend(struct device *dev);
extern int pm_runtime_clk_resume(struct device *dev);
#else
static inline int pm_runtime_clk_init(struct device *dev)
{
return -EINVAL;
}
static inline void pm_runtime_clk_destroy(struct device *dev)
{
}
static inline int pm_runtime_clk_add(struct device *dev, const char *con_id)
{
return -EINVAL;
}
static inline void pm_runtime_clk_remove(struct device *dev, const char *con_id)
{
}
#define pm_runtime_clock_suspend NULL
#define pm_runtime_clock_resume NULL
#endif
#ifdef CONFIG_HAVE_CLK
extern void pm_runtime_clk_add_notifier(struct bus_type *bus,
struct pm_clk_notifier_block *clknb);
#else
static inline void pm_runtime_clk_add_notifier(struct bus_type *bus,
struct pm_clk_notifier_block *clknb)
{
}
#endif
#endif