[PATCH v2 1/2] board: toradex: apalis/colibri imx6: Detect new v1.2 SoM variant

[Fabio Estevam]

On Fri, Mar 7, 2025 at 7:35 AM <ernestvanhoecke at gmail.com> wrote:
>
> From: Ernest Van Hoecke <ernest.vanhoecke at toradex.com>
>
> Apalis/Colibri iMX6 V1.2 will replace the STMPE811 ADC/Touch controller
> which is EOL by the TLA2024 ADC and AD7879 touch controller.
>
> To support this new version, we detect the presence of the TLA2024
> during boot and set a new environment variable named "variant". This
> will allow us and users to select the correct DT easily.
>
> By probing via I2C we have a robust detection method instead of relying
> on the existing "board_rev" environment variable which is set by the
> config block. Users can use "variant" in their DT selection and do not
> have to map the board revision to a device tree.
>
> "variant" environment variable behaviour:
> * Empty or absent for all versions below v1.2 (STMPE811)
> * "-v1.2" for all versions starting from v1.2 (TLA2024 + AD7879)
>
> Usage example:
> setenv fdtfile imx6q-apalis${variant}-${fdt_board}.dtb
>
> Signed-off-by: Ernest Van Hoecke <ernest.vanhoecke at toradex.com>
> Reviewed-by: Francesco Dolcini <francesco.dolcini at toradex.com>
> ---
> v2: Fixed the "From" field

Applied both to u-boot-imx/next, thanks.