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Commit a4ed76f7 authored by Sahitya Tummala's avatar Sahitya Tummala
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mmc: sdhci-msm: Fix SD card detection issue 



The change in pull configs might not take into effect immediately
and any value read before it is stabilized will mark incorrect
card status. This causes SD card detection to fail when inserted
for the first time. Fix this by adding enough delay after
configuring the GPIO and before reading its value.

Change-Id: I3a8455ce404988ab5eb3ed04c0f90ab6edf76d86
Signed-off-by: default avatarSahitya Tummala <stummala@codeaurora.org>
parent 5e498329

drivers/mmc/host/sdhci-msm.c

+6 −1
Original line number Diff line number Diff line
@@ -2,7 +2,7 @@ 
 * drivers/mmc/host/sdhci-msm.c - Qualcomm MSM SDHCI Platform

 * driver source file

 *

 * Copyright (c) 2012-2014, The Linux Foundation. All rights reserved.

 * Copyright (c) 2012-2015, The Linux Foundation. All rights reserved.

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 and
@@ -3365,6 +3365,11 @@ static int sdhci_msm_probe(struct platform_device *pdev) 
		 */

		sdhci_msm_setup_pins(msm_host->pdata, true);



		/*

		 * This delay is needed for stabilizing the card detect GPIO

		 * line after changing the pull configs.

		 */

		usleep_range(10000, 10500);

		ret = mmc_gpio_request_cd(msm_host->mmc,

				msm_host->pdata->status_gpio);

		if (ret) {