On 30/11/22 10:02, Wenchao Chen wrote:
> After switching the voltage, no reset data and command will cause
> CMD2 timeout.
>
> Fixes: 29ca763fc26f ("mmc: sdhci-sprd: Add pin control support for voltage switch")
> Signed-off-by: Wenchao Chen <wenchao.chen@xxxxxxxxxx>
Acked-by: Adrian Hunter <adrian.hunter@xxxxxxxxx>
> ---
> drivers/mmc/host/sdhci-sprd.c | 3 ++-
> 1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/mmc/host/sdhci-sprd.c b/drivers/mmc/host/sdhci-sprd.c
> index b92a408f138d..464508be8ec8 100644
> --- a/drivers/mmc/host/sdhci-sprd.c
> +++ b/drivers/mmc/host/sdhci-sprd.c
> @@ -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:
> @@ -496,6 +496,7 @@ static int sdhci_sprd_voltage_switch(struct mmc_host *mmc, struct mmc_ios *ios)
> break;
> }
>
> +reset:
> /* Wait for 300 ~ 500 us for pin state stable */
> usleep_range(300, 500);
> sdhci_reset(host, SDHCI_RESET_CMD | SDHCI_RESET_DATA);
