On Mon, Aug 26, 2024 at 4:44 PM Niklas Söderlund
<niklas.soderlund+renesas@xxxxxxxxxxxx> wrote:
> The ISP Channel Selector IP is the same for all current Gen4 devices.
> This was not known when adding support for V3U and V4H and a single SoC
> specific compatible was used.
>
> Before adding more SoC specific bindings for V4M add a family compatible
> fallback for Gen4. That way the driver only needs to be updated once for
> Gen4, and we still have the option to fix any problems in the driver if
> any testable differences between the SoCs are found.
>
> There are already DTS files using the V3U and V4H compatibles which
> needs to be updated to not produce a warning for DTS checks. The driver
> also needs to kept the compatible values to be backward compatible , but
> for new Gen4 SoCs such as V4M we can avoid this.
>
> Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@xxxxxxxxxxxx>
> ---
> * Changes since v1
> - New in v2.
Reviewed-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>
This is in line with Section 2.3.1 ("Standard Properties / Compatible")
of the Devicetree Specification, Release v0.4, as it is used "to express
compatibility with a family of similar devices". Note that this does
deviate slightly from the recommended format in the specification
("manufacturer,model"), as the fallback "model" specifies a family,
not a model number.
As such I think this is fine, and consistent with lots of other existing
family-specific compatible values.
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
