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Commit e9ed8835 authored by Shawn Lin's avatar Shawn Lin Committed by Ulf Hansson
Browse files

mmc: dw_mmc: add runtime PM callback 



This patch add dw_mci_runtime_suspend/resume interfaces
and expose it to dw_mci variant driver to support runtime
PM.

Signed-off-by: default avatarShawn Lin <shawn.lin@rock-chips.com>
Signed-off-by: default avatarJaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: default avatarUlf Hansson <ulf.hansson@linaro.org>
parent 70562644

drivers/mmc/host/dw_mmc.c

+30 −2
Original line number Diff line number Diff line
@@ -3267,7 +3267,7 @@ EXPORT_SYMBOL(dw_mci_remove); 






#ifdef CONFIG_PM_SLEEP

#ifdef CONFIG_PM

/*

 * TODO: we should probably disable the clock to the card in the suspend path.

 */
@@ -3325,7 +3325,35 @@ int dw_mci_resume(struct dw_mci *host) 
	return 0;

}

EXPORT_SYMBOL(dw_mci_resume);

#endif /* CONFIG_PM_SLEEP */



int dw_mci_runtime_suspend(struct device *dev)

{

	int err = 0;

	struct dw_mci *host = dev_get_drvdata(dev);



	err = dw_mci_suspend(host);

	if (err)

		return err;



	clk_disable_unprepare(host->ciu_clk);



	return err;

}

EXPORT_SYMBOL(dw_mci_runtime_suspend);



int dw_mci_runtime_resume(struct device *dev)

{

	int ret = 0;

	struct dw_mci *host = dev_get_drvdata(dev);



	ret = clk_prepare_enable(host->ciu_clk);

	if (ret)

		return ret;



	return dw_mci_resume(host);

}

EXPORT_SYMBOL(dw_mci_runtime_resume);

#endif /* CONFIG_PM */



static int __init dw_mci_init(void)

{

drivers/mmc/host/dw_mmc.h

+3 −1
Original line number Diff line number Diff line
@@ -234,9 +234,11 @@ 


extern int dw_mci_probe(struct dw_mci *host);

extern void dw_mci_remove(struct dw_mci *host);

#ifdef CONFIG_PM_SLEEP

#ifdef CONFIG_PM

extern int dw_mci_suspend(struct dw_mci *host);

extern int dw_mci_resume(struct dw_mci *host);

extern int dw_mci_runtime_suspend(struct device *device);

extern int dw_mci_runtime_resume(struct device *device);

#endif



/**