Commit 247bbeb74c ("ARM: dts: imx8m: increase off-on delay on the SD Vcc
regulator") caused the imx8mq-evk board to not be able to store the
environment variables in the SD card.
Remove the u-boot,off-on-delay-us property to fix the regression.
Signed-off-by: Fabio Estevam <festevam@gmail.com>
Reviewed-by: Andrey Zhizhikin <andrey.zhizhikin@leica-geosystems.com>
i.MX8M series provide support for high speed grades in their
usdhc controllers, which has eMMC and SDHC connected to them.
Enable this support across the entire i.MX8M family by providing quirks
to usdhc controllers designated by storage media connected to them.
Signed-off-by: Andrey Zhizhikin <andrey.zhizhikin@leica-geosystems.com>
Cc: Stefano Babic <sbabic@denx.de>
Cc: Ye Li <ye.li@nxp.com>
Some SD Card controller and power circuitry has increased capacitance,
which keeps the internal logic remains powered after regulator is switch
off. This is generally the case when card is switched to SD104 mode,
where a power cycle should be performed. In case if the card internal
logic remains powered, it causes a subsequent failure of mode
transition, effectively leading to failed enumeration.
Introduce a delay of 20 msec in order to provide a possibility for
internal card circuitry to drain voltages and perform a power cycle
correctly.
Similar fix is done in commit c49d0ac38a ("ARM: dts: rmobile: Increase
off-on delay on the SD Vcc regulator") targeted Renesas SOCs.
Signed-off-by: Andrey Zhizhikin <andrey.zhizhikin@leica-geosystems.com>
Cc: Stefano Babic <sbabic@denx.de>
