mmc: sdhci: Reset cmd and data circuits after tuning failure

To prevent subsequent commands failing, ensure the cmd and data circuits are reset after a tuning timeout. Signed-off-by: Adrian Hunter <[email protected]> Signed-off-by: Ulf Hansson <[email protected]>
redbrain17 · Nov 7, 2016 · fe5fb2e · fe5fb2e
1 parent 69b962a
commit fe5fb2e
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
@@ -2086,6 +2086,10 @@ static int sdhci_execute_tuning(struct mmc_host *mmc, u32 opcode)
 
 		if (!host->tuning_done) {
 			pr_info(DRIVER_NAME ": Timeout waiting for Buffer Read Ready interrupt during tuning procedure, falling back to fixed sampling clock\n");
+
+			sdhci_do_reset(host, SDHCI_RESET_CMD);
+			sdhci_do_reset(host, SDHCI_RESET_DATA);
+
 			ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2);
 			ctrl &= ~SDHCI_CTRL_TUNED_CLK;
 			ctrl &= ~SDHCI_CTRL_EXEC_TUNING;