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usdhc1 card remove is not detected

Question asked by CHAYAN BISWAS on May 15, 2018
Latest reply on May 17, 2018 by igorpadykov

I am using iMX6ul usdhc1 to connect to WLAN module. In my device tree file, usdhc1 is configured as removable as below:

&usdhc1 {
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_usdhc1>;
keep-power-in-suspend;
enable-sdio-wakeup;
status = "okay";
};

and my defconfig looks like below:


#
# MMC/SD/SDIO Host Controller Drivers
#
CONFIG_MMC_SDHCI=y
CONFIG_MMC_SDHCI_PLTFM=y
CONFIG_MMC_SDHCI_ESDHC_IMX=y

I am facing problem when I am switching off wlan module, MMC driver is not detecting as "card removed"
Usually I should expect event like:

[223923.940000] mmc0: card 0001 removed

And then, when I switch on wlan I should expect event like below:

[223924.060000] mmc0: new high speed SDIO card at address 0001

Which is not happenning, And wlan host driver can not comunicate with wlan module any more after that.
Please let me know, if I am missing anything? or what needs to be done here.

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