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Groups > linux.kernel > #1544919

[PATCH 2/4] mmc: mmc: Add change to set controller to HS400 frequency in enhanced strobe

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Currently mmc_select_hs400es is not setting the desired frequency
before sending switch command. This makes CMD13 to timeout on
some controllers.
Thus add a change to set the desired HS400 frequency
in mmc_select_hs400es when the timing is switched to HS400.

Signed-off-by: Ritesh Harjani <riteshh@codeaurora.org>
---
 drivers/mmc/core/mmc.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c
index b61b52f9..eb69497 100644
--- a/drivers/mmc/core/mmc.c
+++ b/drivers/mmc/core/mmc.c
@@ -1329,6 +1329,7 @@ static int mmc_select_hs400es(struct mmc_card *card)
 
 	/* Set host controller to HS400 timing and frequency */
 	mmc_set_timing(host, MMC_TIMING_MMC_HS400);
+	mmc_set_bus_speed(card);
 
 	/* Controller enable enhanced strobe function */
 	host->ios.enhanced_strobe = true;
-- 
The Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, 
a Linux Foundation Collaborative Project.

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[PATCH 2/4] mmc: mmc: Add change to set controller to HS400 frequency in enhanced strobe Ritesh Harjani <riteshh@codeaurora.org> - 2016-12-20 07:00 +0100
  Re: [PATCH 2/4] mmc: mmc: Add change to set controller to HS400  frequency in enhanced strobe Shawn Lin <shawn.lin@rock-chips.com> - 2016-12-20 08:40 +0100
    Re: [PATCH 2/4] mmc: mmc: Add change to set controller to HS400  frequency in enhanced strobe Ritesh Harjani <riteshh@codeaurora.org> - 2016-12-20 11:40 +0100
      Re: [PATCH 2/4] mmc: mmc: Add change to set controller to HS400  frequency in enhanced strobe Shawn Lin <shawn.lin@rock-chips.com> - 2016-12-20 12:10 +0100
        Re: [PATCH 2/4] mmc: mmc: Add change to set controller to HS400  frequency in enhanced strobe Ritesh Harjani <riteshh@codeaurora.org> - 2016-12-20 13:10 +0100

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