On 11/30/2022 4:02 PM, 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>
---
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);
If no pin state switching, still need stable time? Otherwise looks good
to me.
sdhci_reset(host, SDHCI_RESET_CMD | SDHCI_RESET_DATA);
