From: Adrian Hunter <adrian.hunter@intel.com>
To: Ulf Hansson <ulf.hansson@linaro.org>
Cc: linux-mmc <linux-mmc@vger.kernel.org>,
Harjani Ritesh <riteshh@codeaurora.org>
Subject: [PATCH 3/4] mmc: sdhci: Reset cmd and data circuits after tuning failure
Date: Wed, 2 Nov 2016 15:49:10 +0200 [thread overview]
Message-ID: <1478094551-24819-4-git-send-email-adrian.hunter@intel.com> (raw)
In-Reply-To: <1478094551-24819-1-git-send-email-adrian.hunter@intel.com>
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>
---
drivers/mmc/host/sdhci.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index e7e1a70645e3..f8cb9a958738 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -2083,6 +2083,10 @@ 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;
--
1.9.1
next prev parent reply other threads:[~2016-11-02 13:54 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-11-02 13:49 [PATCH 0/4] mmc: sdhci: Fixes Adrian Hunter
2016-11-02 13:49 ` [PATCH 1/4] mmc: sdhci: Fix CMD line reset interfering with ongoing data transfer Adrian Hunter
2016-11-02 13:49 ` [PATCH 2/4] mmc: sdhci: Fix unexpected data interrupt handling Adrian Hunter
2016-11-02 13:49 ` Adrian Hunter [this message]
2016-11-02 13:49 ` [PATCH 4/4] mmc: sdhci: Fix missing enhanced strobe setting during runtime resume Adrian Hunter
2016-11-07 12:43 ` [PATCH 0/4] mmc: sdhci: Fixes Ulf Hansson
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