Hi Andrey, On Mon, Feb 22, 2021 at 9:19 AM Fabio Estevam <[email protected]> wrote:
> The issue now is that saving the environment to the SD card is no > longer working. > > I will investigate the SD card issue now. This was caused by the following commit: commit 247bbeb74c186963d9365db3136d0285618bd9a7 Author: Andrey Zhizhikin <[email protected]> Date: Sat Dec 5 17:29:17 2020 +0000 ARM: dts: imx8m: increase off-on delay on the SD Vcc regulator 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 c49d0ac38a76 ("ARM: dts: rmobile: Increase off-on delay on the SD Vcc regulator") targeted Renesas SOCs. Signed-off-by: Andrey Zhizhikin <[email protected]> Cc: Stefano Babic <[email protected]> I will send a fix. Thanks, Fabio Estevam
