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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
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+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.
 */
+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)
{