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ARM: 7622/1: mmc: mmci: Gate the clock in runtime suspend to save power

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The amba bus is already performing same actions but for the apb_pclk.
So here we just make sure the clock to card is gated as well to save
more power. At runtime resume we will thus restore the clock again.

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Acked-by: Kevin Liu <kliu5@marvell.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Ulf Hansson 2013-01-09 11:15:26 +01:00 committed by Russell King
parent 599c1d5c75
commit 8259293aee
1 changed files with 29 additions and 0 deletions
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29
drivers/mmc/host/mmci.c
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@ -1614,8 +1614,37 @@ static int mmci_resume(struct device *dev)
}
#endif
#ifdef CONFIG_PM_RUNTIME
static int mmci_runtime_suspend(struct device *dev)
{
struct amba_device *adev = to_amba_device(dev);
struct mmc_host *mmc = amba_get_drvdata(adev);
if (mmc) {
struct mmci_host *host = mmc_priv(mmc);
clk_disable_unprepare(host->clk);
}
return 0;
}
static int mmci_runtime_resume(struct device *dev)
{
struct amba_device *adev = to_amba_device(dev);
struct mmc_host *mmc = amba_get_drvdata(adev);
if (mmc) {
struct mmci_host *host = mmc_priv(mmc);
clk_prepare_enable(host->clk);
}
return 0;
}
#endif
static const struct dev_pm_ops mmci_dev_pm_ops = {
SET_SYSTEM_SLEEP_PM_OPS(mmci_suspend, mmci_resume)
SET_RUNTIME_PM_OPS(mmci_runtime_suspend, mmci_runtime_resume, NULL)
};
static struct amba_id mmci_ids[] = {