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Commit 1f5c51d7 authored by Shawn Lin's avatar Shawn Lin Committed by Ulf Hansson
Browse files

mmc: dw_mmc: disable biu clk if possible 



We could disable biu clk if gpio card detect available,
or it is a non-removable device.

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 50fcbbbb

drivers/mmc/host/dw_mmc-rockchip.c

+1 −0
Original line number Diff line number Diff line
@@ -13,6 +13,7 @@ 
#include <linux/mmc/host.h>

#include <linux/mmc/dw_mmc.h>

#include <linux/of_address.h>

#include <linux/mmc/slot-gpio.h>

#include <linux/pm_runtime.h>

#include <linux/slab.h>

drivers/mmc/host/dw_mmc.c

+13 −0
Original line number Diff line number Diff line
@@ -3337,6 +3337,11 @@ int dw_mci_runtime_suspend(struct device *dev) 


	clk_disable_unprepare(host->ciu_clk);



	if (host->cur_slot &&

	    (mmc_can_gpio_cd(host->cur_slot->mmc) ||

	     !mmc_card_is_removable(host->cur_slot->mmc)))

		clk_disable_unprepare(host->biu_clk);



	return err;

}

EXPORT_SYMBOL(dw_mci_runtime_suspend);
@@ -3346,6 +3351,14 @@ int dw_mci_runtime_resume(struct device *dev) 
	int ret = 0;

	struct dw_mci *host = dev_get_drvdata(dev);



	if (host->cur_slot &&

	    (mmc_can_gpio_cd(host->cur_slot->mmc) ||

	     !mmc_card_is_removable(host->cur_slot->mmc))) {

		ret = clk_prepare_enable(host->biu_clk);

		if (ret)

			return ret;

	}



	ret = clk_prepare_enable(host->ciu_clk);

	if (ret)

		return ret;