mmc: add runtime PM handlers
Add MMC runtime PM handlers, which call mmc_power_save_host and mmc_power_restore_host in response to runtime_suspend and runtime_resume events. Runtime PM is still disabled by default, so this patch alone has no immediate effect. Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com> Tested-by: Luciano Coelho <luciano.coelho@nokia.com> Signed-off-by: Chris Ball <cjb@laptop.org>
This commit is contained in:
parent
d3fe37b1a1
commit
516d5ccdc6
1 changed files with 37 additions and 0 deletions
|
@ -14,6 +14,7 @@
|
|||
#include <linux/device.h>
|
||||
#include <linux/err.h>
|
||||
#include <linux/slab.h>
|
||||
#include <linux/pm_runtime.h>
|
||||
|
||||
#include <linux/mmc/card.h>
|
||||
#include <linux/mmc/host.h>
|
||||
|
@ -141,6 +142,41 @@ static int mmc_bus_resume(struct device *dev)
|
|||
return ret;
|
||||
}
|
||||
|
||||
#ifdef CONFIG_PM_RUNTIME
|
||||
|
||||
static int mmc_runtime_suspend(struct device *dev)
|
||||
{
|
||||
struct mmc_card *card = mmc_dev_to_card(dev);
|
||||
|
||||
return mmc_power_save_host(card->host);
|
||||
}
|
||||
|
||||
static int mmc_runtime_resume(struct device *dev)
|
||||
{
|
||||
struct mmc_card *card = mmc_dev_to_card(dev);
|
||||
|
||||
return mmc_power_restore_host(card->host);
|
||||
}
|
||||
|
||||
static int mmc_runtime_idle(struct device *dev)
|
||||
{
|
||||
return pm_runtime_suspend(dev);
|
||||
}
|
||||
|
||||
static const struct dev_pm_ops mmc_bus_pm_ops = {
|
||||
.runtime_suspend = mmc_runtime_suspend,
|
||||
.runtime_resume = mmc_runtime_resume,
|
||||
.runtime_idle = mmc_runtime_idle,
|
||||
};
|
||||
|
||||
#define MMC_PM_OPS_PTR (&mmc_bus_pm_ops)
|
||||
|
||||
#else /* !CONFIG_PM_RUNTIME */
|
||||
|
||||
#define MMC_PM_OPS_PTR NULL
|
||||
|
||||
#endif /* !CONFIG_PM_RUNTIME */
|
||||
|
||||
static struct bus_type mmc_bus_type = {
|
||||
.name = "mmc",
|
||||
.dev_attrs = mmc_dev_attrs,
|
||||
|
@ -150,6 +186,7 @@ static struct bus_type mmc_bus_type = {
|
|||
.remove = mmc_bus_remove,
|
||||
.suspend = mmc_bus_suspend,
|
||||
.resume = mmc_bus_resume,
|
||||
.pm = MMC_PM_OPS_PTR,
|
||||
};
|
||||
|
||||
int mmc_register_bus(void)
|
||||
|
|
Reference in a new issue