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Commit 0ddfedec authored by Asutosh Das's avatar Asutosh Das Committed by Stephen Boyd
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mmc: sdhci: add sdio wakeup event 



This patch adds wakeup event capability for sdio cards.
When a wakeup event is received during suspend, a reference
to the card devices' wakeup source is taken for 300 ms.

It is expected that the function driver would act on the
wakeup event within this time-period.

Change-Id: I80fe0c450e8d9b3df51aa181d667d94517c961dc
Signed-off-by: default avatarAsutosh Das <asutoshd@codeaurora.org>
parent 7e63010c

drivers/mmc/host/sdhci.c

+14 −3
Original line number Diff line number Diff line
@@ -33,6 +33,7 @@ 
#include "sdhci.h"



#define DRIVER_NAME "sdhci"

#define SDHCI_SUSPEND_TIMEOUT 300 /* 300 ms */



#define DBG(f, x...) \

	pr_debug(DRIVER_NAME " [%s()]: " f, __func__,## x)
@@ -2873,6 +2874,12 @@ static irqreturn_t sdhci_irq(int irq, void *dev_id) 
			mmc_hostname(host->mmc), host->clock,

			host->mmc->clk_gated, host->irq_enabled);

		spin_unlock(&host->lock);

		/* prevent suspend till the ksdioirqd runs or resume happens */

		if ((host->mmc->dev_status == DEV_SUSPENDING) ||

		    (host->mmc->dev_status == DEV_SUSPENDED))

			pm_wakeup_event(&host->mmc->card->dev,

					SDHCI_SUSPEND_TIMEOUT);

		else

			mmc_signal_sdio_irq(host->mmc);

		return IRQ_HANDLED;

	}
@@ -2968,9 +2975,13 @@ out: 
	/*

	 * We have to delay this as it calls back into the driver.

	 */

	if (cardint)

	if (cardint) {

		/* clks are on, but suspend may be in progress */

		if (host->mmc->dev_status == DEV_SUSPENDING)

			pm_wakeup_event(&host->mmc->card->dev,

					SDHCI_SUSPEND_TIMEOUT);

		mmc_signal_sdio_irq(host->mmc);



	}

	return result;

}