This is a note to let you know that I've just added the patch titled
mmc: sdhci-esdhc-imx: fix cd regression for dt platform
to the 4.1-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
mmc-sdhci-esdhc-imx-fix-cd-regression-for-dt-platform.patch
and it can be found in the queue-4.1 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 4800e87a2ee886c1972deb73f057d1a6541edb36 Mon Sep 17 00:00:00 2001
From: Dong Aisheng <aisheng.dong@xxxxxxxxxxxxx>
Date: Wed, 22 Jul 2015 20:53:05 +0800
Subject: mmc: sdhci-esdhc-imx: fix cd regression for dt platform
From: Dong Aisheng <aisheng.dong@xxxxxxxxxxxxx>
commit 4800e87a2ee886c1972deb73f057d1a6541edb36 upstream.
Current card detect probe process is that when driver finds a valid
ESDHC_CD_GPIO, it will clear the quirk SDHCI_QUIRK_BROKEN_CARD_DETECTION
which is set by default for all esdhc/usdhc controllers.
Then host driver will know there's a valid card detect function.
Commit 8d86e4fcccf6 ("mmc: sdhci-esdhc-imx: Call mmc_of_parse()")
breaks GPIO CD function for dt platform that it will return directly
when find ESDHC_CD_GPIO for dt platform which result in the later wrongly
to keep SDHCI_QUIRK_BROKEN_CARD_DETECTION for all dt platforms.
Then MMC_CAP_NEEDS_POLL will be used instead even there's a valid
GPIO card detect.
This patch adds back this function and follows the original approach to
clear the quirk if find an valid CD GPIO for dt platforms.
Fixes: 8d86e4fcccf6 ("mmc: sdhci-esdhc-imx: Call mmc_of_parse()")
Signed-off-by: Dong Aisheng <aisheng.dong@xxxxxxxxxxxxx>
Reviewed-by: Johan Derycke <johan.derycke@xxxxxxxxx>
Signed-off-by: Ulf Hansson <ulf.hansson@xxxxxxxxxx>
Signed-off-by: Fabio Estevam <fabio.estevam@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/mmc/host/sdhci-esdhc-imx.c | 10 +++++++++-
1 file changed, 9 insertions(+), 1 deletion(-)
--- a/drivers/mmc/host/sdhci-esdhc-imx.c
+++ b/drivers/mmc/host/sdhci-esdhc-imx.c
@@ -868,6 +868,7 @@ sdhci_esdhc_imx_probe_dt(struct platform
struct esdhc_platform_data *boarddata)
{
struct device_node *np = pdev->dev.of_node;
+ int ret;
if (!np)
return -ENODEV;
@@ -904,7 +905,14 @@ sdhci_esdhc_imx_probe_dt(struct platform
mmc_of_parse_voltage(np, &host->ocr_mask);
/* call to generic mmc_of_parse to support additional capabilities */
- return mmc_of_parse(host->mmc);
+ ret = mmc_of_parse(host->mmc);
+ if (ret)
+ return ret;
+
+ if (!IS_ERR_VALUE(mmc_gpio_get_cd(host->mmc)))
+ host->quirks &= ~SDHCI_QUIRK_BROKEN_CARD_DETECTION;
+
+ return 0;
}
#else
static inline int
Patches currently in stable-queue which might be from aisheng.dong@xxxxxxxxxxxxx are
queue-4.1/dts-imx51-fix-sd-card-gpio-polarity-specified-in-device-tree.patch
queue-4.1/dts-imx6-fix-sd-card-gpio-polarity-specified-in-device-tree.patch
queue-4.1/dts-imx25-fix-sd-card-gpio-polarity-specified-in-device-tree.patch
queue-4.1/dts-imx53-fix-sd-card-gpio-polarity-specified-in-device-tree.patch
queue-4.1/mmc-sdhci-esdhc-imx-fix-cd-regression-for-dt-platform.patch
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