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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 <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Adrian Hunter 2016-11-02 15:49:10 +02:00 committed by Ulf Hansson
parent 69b962a65a
commit fe5fb2e3b5
1 changed files with 4 additions and 0 deletions
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4
drivers/mmc/host/sdhci.c
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@ -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;