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| author | Ohad Ben-Cohen <ohad@wizery.com> | 2010-10-02 13:54:08 +0200 |
|---|---|---|
| committer | Chris Ball <cjb@laptop.org> | 2010-10-23 21:11:18 +0800 |
| commit | 516d5ccdc61178b9701af1adfa86a306d51fbad2 (patch) | |
| tree | 7e38502d54516d8e747e1f6478083af1ee686a7a /drivers/mmc/core | |
| parent | d3fe37b1a1d98f060279bfa32fcf5a134851a91a (diff) | |
| download | kernel_samsung_smdk4412-516d5ccdc61178b9701af1adfa86a306d51fbad2.zip kernel_samsung_smdk4412-516d5ccdc61178b9701af1adfa86a306d51fbad2.tar.gz kernel_samsung_smdk4412-516d5ccdc61178b9701af1adfa86a306d51fbad2.tar.bz2 | |
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>
Diffstat (limited to 'drivers/mmc/core')
| -rw-r--r-- | drivers/mmc/core/bus.c | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/drivers/mmc/core/bus.c b/drivers/mmc/core/bus.c index da3c01b..af8dc6a 100644 --- a/drivers/mmc/core/bus.c +++ b/drivers/mmc/core/bus.c @@ -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) |