[PATCH v4] cmd: mmc: Add mmc reg read command for reading card registers

[Fabio Estevam]

On Tue, Oct 31, 2023 at 9:20 AM Marek Vasut <marex at denx.de> wrote:
>
> Add extension to the 'mmc' command to read out the card registers.
> Currently, only the eMMC OCR/CID/CSD/EXTCSD/RCA/DSR register are
> supported. A register value can either be displayed or read into
> an environment variable.
>
> Tested-by: Jaehoon Chung <jh80.chung at samsung.com>
> Reviewed-by: Jaehoon Chung <jh80.chung at samsung.com>
> Signed-off-by: Marek Vasut <marex at denx.de>

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