Commit 0e8efbab authored Jun 23, 2014 by Krishna Konda Committed by Xiaonian Wang Apr 07, 2017

sdhci: sdhci-msm: fix issue with hs400 mode



In HS400 mode, command line is still operated in SDR mode and not
DDR mode like data lines. So in order to correctly process command
responses, the hardware needs to be set appropriately or else there
will command crc or similar errors due to incorrect sampling of the
response.

Change-Id: I426ff4fc4798afae254d11a608c800dc0b7bf765
Signed-off-by: Krishna Konda <kkonda@codeaurora.org>

parent 2faa7bbe

drivers/mmc/host/sdhci-msm.c

+5 −0

Original line number	Diff line number	Diff line
		@@ -893,6 +893,11 @@ static int sdhci_msm_hs400_dll_calibration(struct sdhci_host *host)
		if (ret)
		goto out;

		/* Write 1 to CMD_DAT_TRACK_SEL field in DLL_CONFIG */
		writel_relaxed((readl_relaxed(host->ioaddr + CORE_DLL_CONFIG)
		\| CORE_CMD_DAT_TRACK_SEL),
		host->ioaddr + CORE_DLL_CONFIG);

		if (msm_host->use_cdclp533)
		/* Calibrate CDCLP533 DLL HW */
		ret = sdhci_msm_cdclp533_calibration(host);