Re: [PATCH v3 2/5] dt-bindings: watchdog: apple,wdt: Add t8122 compatible

[Guenter Roeck <linux@roeck-us.net>]

On Thu, May 07, 2026 at 09:33:08AM +0200, Janne Grunau wrote:
> The watchdog on the Apple silicon t8122 (M3) SoC is compatible with the
> existing driver. Add "apple,t8122-wdt" as SoC specific compatible under
> "apple,t8103-wdt" used by the driver.

'"apple,t8103-wdt" used by the driver' is not true. The watchdog driver
only supports "apple,wdt".

> 
> Acked-by: Rob Herring (Arm) <robh@kernel.org>
> Reviewed-by: Joshua Peisach <jpeisach@ubuntu.com>
> Reviewed-by: Neal Gompa <neal@gompa.dev>
> Signed-off-by: Janne Grunau <j@jannau.net>
> ---
>  Documentation/devicetree/bindings/watchdog/apple,wdt.yaml | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/Documentation/devicetree/bindings/watchdog/apple,wdt.yaml b/Documentation/devicetree/bindings/watchdog/apple,wdt.yaml
> index 05602678c070..845b5e8b5abc 100644
> --- a/Documentation/devicetree/bindings/watchdog/apple,wdt.yaml
> +++ b/Documentation/devicetree/bindings/watchdog/apple,wdt.yaml
> @@ -16,7 +16,9 @@ properties:
>    compatible:
>      oneOf:
>        - items:
> -          - const: apple,t6020-wdt
> +          - enum:
> +              - apple,t6020-wdt
> +              - apple,t8122-wdt
>            - const: apple,t8103-wdt
>        - items:
>            - enum:

I second Sashiko's findings that the driver will fail to bind because it
only supports "apple,wdt". I would not mind and apply the patch anyway,
but the statement in the description is just plain wrong and thus
misleading. Please fix.

Thanks,
Guenter