On Tue, Nov 04, 2025 at 01:51:11PM +0800, Billy Tsai wrote:
> Adds support for the AST2700 PWM/Tach controller by extending the
> compatible string enumeration in the device tree binding.
> 
> The AST2700 PWM/Tach hardware is compatible with the existing binding
> schema and requires no additional properties or modifications beyond
> the new compatible string.

With this commit message, I expected there to be a fallback compatible.
Why isn't one used?

> 
> Signed-off-by: Billy Tsai <billy_tsai@aspeedtech.com>
> ---
>  Documentation/devicetree/bindings/hwmon/aspeed,g6-pwm-tach.yaml | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/Documentation/devicetree/bindings/hwmon/aspeed,g6-pwm-tach.yaml b/Documentation/devicetree/bindings/hwmon/aspeed,g6-pwm-tach.yaml
> index 9e5ed901ae54..d6ff4182085e 100644
> --- a/Documentation/devicetree/bindings/hwmon/aspeed,g6-pwm-tach.yaml
> +++ b/Documentation/devicetree/bindings/hwmon/aspeed,g6-pwm-tach.yaml
> @@ -20,6 +20,7 @@ properties:
>    compatible:
>      enum:
>        - aspeed,ast2600-pwm-tach
> +      - aspeed,ast2700-pwm-tach
>  
>    reg:
>      maxItems: 1
> -- 
> 2.25.1
>