[PATCH] toradex: colibri_imx7: Enable nand/emmc detection and set boot variant

[Fabio Estevam]

On Mon, Oct 2, 2023 at 10:08 AM Hiago De Franco <hiagofranco at gmail.com> wrote:
>
> From: Hiago De Franco <hiago.franco at toradex.com>
>
> Add detection of eMMC vs NAND devices on the Colibri iMX7
> board. A GPIO is configured to detect the presence of an on-board resistor
> that is configured differently based on the flash memory used. Depending on
> the detection result, the 'variant' environment variable is set to '-emmc'
> or cleared, indicating the type of storage device.
>
> This enhancement improves variant detection during system initialization
> through USB recovery mode, where U-Boot is loaded directly to RAM. This
> allows variant detection for an accurate device tree selection.
>
> Signed-off-by: Hiago De Franco <hiago.franco at toradex.com>

Reviewed-by: Fabio Estevam <festevam at gmail.com>