i.MX8MQ EVK not booting with latest mainline U-Boot

[Fabio Estevam]

Hi Andrey,

On Mon, Feb 22, 2021 at 9:19 AM Fabio Estevam <festevam at gmail.com> 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 <andrey.zhizhikin at leica-geosystems.com>
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 <andrey.zhizhikin at leica-geosystems.com>
    Cc: Stefano Babic <sbabic at denx.de>

I will send a fix.

Thanks,

Fabio Estevam