Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 276e090f authored by Johan Rudholm's avatar Johan Rudholm Committed by Chris Ball
Browse files

mmc: core: Add mmc_power_cycle 



Add mmc_power_cycle which can be used to power cycle for instance
SD-cards.

Signed-off-by: default avatarJohan Rudholm <johan.rudholm@stericsson.com>
Acked-by: default avatarUlf Hansson <ulf.hansson@linaro.org>
Tested-by: default avatarWei WANG <wei_wang@realsil.com.cn>
Signed-off-by: default avatarChris Ball <cjb@laptop.org>
parent 3f8a7fab

drivers/mmc/core/core.c

+8 −0
Original line number Diff line number Diff line
@@ -1470,6 +1470,14 @@ void mmc_power_off(struct mmc_host *host) 
	mmc_host_clk_release(host);

}



void mmc_power_cycle(struct mmc_host *host)

{

	mmc_power_off(host);

	/* Wait at least 1 ms according to SD spec */

	mmc_delay(1);

	mmc_power_up(host);

}



/*

 * Cleanup when the last reference to the bus operator is dropped.

 */

drivers/mmc/core/core.h

+1 −0
Original line number Diff line number Diff line
@@ -45,6 +45,7 @@ int mmc_set_signal_voltage(struct mmc_host *host, int signal_voltage, 
void mmc_set_timing(struct mmc_host *host, unsigned int timing);

void mmc_set_driver_type(struct mmc_host *host, unsigned int drv_type);

void mmc_power_off(struct mmc_host *host);

void mmc_power_cycle(struct mmc_host *host);



static inline void mmc_delay(unsigned int ms)

{