From: Ulf Hansson Date: Wed, 4 Sep 2013 08:00:37 +0000 (+0100) Subject: ARM: 7832/1: mmc: mmci: Use optional sleep pinctrl state X-Git-Tag: next-20130927~90^2^4~2 X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=e36bd9c6c99f47902d6fd6804730aa587ae275a0;p=karo-tx-linux.git ARM: 7832/1: mmc: mmci: Use optional sleep pinctrl state By optionally putting the pins into sleep state in the .runtime_suspend callback we can accomplish two things. One is to minimize current leakage from pins and thus save power, second we can prevent the IP from driving pins output in an uncontrolled manner, which may happen if the power domain drops the domain regulator. When returning from idle, entering .runtime_resume callback, the pins are restored to default state. Signed-off-by: Ulf Hansson Acked-by: Rickard Andersson Reviewed-by: Linus Walleij Signed-off-by: Russell King --- diff --git a/drivers/mmc/host/mmci.c b/drivers/mmc/host/mmci.c index 5dffbbd57663..c550b3ebb635 100644 --- a/drivers/mmc/host/mmci.c +++ b/drivers/mmc/host/mmci.c @@ -1750,6 +1750,7 @@ static int mmci_runtime_suspend(struct device *dev) if (mmc) { struct mmci_host *host = mmc_priv(mmc); + pinctrl_pm_select_sleep_state(dev); clk_disable_unprepare(host->clk); } @@ -1764,6 +1765,7 @@ static int mmci_runtime_resume(struct device *dev) if (mmc) { struct mmci_host *host = mmc_priv(mmc); clk_prepare_enable(host->clk); + pinctrl_pm_select_default_state(dev); } return 0;