Commit dd30dcfa authored by Wenchao Chen's avatar Wenchao Chen Committed by Ulf Hansson
Browse files

mmc: sdhci-sprd: Fix no reset data and command after voltage switch 



After switching the voltage, no reset data and command will cause
CMD2 timeout.

Fixes: 29ca763f ("mmc: sdhci-sprd: Add pin control support for voltage switch")
Signed-off-by: default avatarWenchao Chen <wenchao.chen@unisoc.com>
Acked-by: default avatarAdrian Hunter <adrian.hunter@intel.com>
Reviewed-by: default avatarBaolin Wang <baolin.wang@linux.alibaba.com>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20221130121328.25553-1-wenchao.chen@unisoc.com


Signed-off-by: default avatarUlf Hansson <ulf.hansson@linaro.org>
parent c981cdfb

drivers/mmc/host/sdhci-sprd.c

+3 −1
Original line number Diff line number Diff line
@@ -470,7 +470,7 @@ static int sdhci_sprd_voltage_switch(struct mmc_host *mmc, struct mmc_ios *ios) 
	}



	if (IS_ERR(sprd_host->pinctrl))

		return 0;

		goto reset;



	switch (ios->signal_voltage) {

	case MMC_SIGNAL_VOLTAGE_180:
@@ -498,6 +498,8 @@ static int sdhci_sprd_voltage_switch(struct mmc_host *mmc, struct mmc_ios *ios) 


	/* Wait for 300 ~ 500 us for pin state stable */

	usleep_range(300, 500);



reset:

	sdhci_reset(host, SDHCI_RESET_CMD | SDHCI_RESET_DATA);



	return 0;