[PATCH 2/2] dt-bindings: samsung: exynos-pmu: Narrow allowed reboot modes

[Peter Griffin]

On Wed, 1 Jul 2026 at 11:57, Krzysztof Kozlowski
<krzysztof.kozlowski at oss.qualcomm.com> wrote:
>
> syscon-reboot-mode schema allows arbitrary "mode-.* properties but only
> a subset actually makes sense and is valid.  Provide negative look-ahead
> pattern to disallow any modes not supported by the device, which
> tightens the binding.
>
> Most of Android-based Exynos devices share the bootloader or its parts,
> thus reboot modes are most likely the same, however only a few upstream
> DTS define them, so add restrictions only for these.
>
> Google GS101 has on the other hand quite different bootloader with many
> known reboot modes.
>
> Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski at oss.qualcomm.com>
> ---

Reviewed-by: Peter Griffin <peter.griffin at linaro.org>

>  .../bindings/soc/samsung/exynos-pmu.yaml      | 21 +++++++++++++++++++
>  1 file changed, 21 insertions(+)
>
> diff --git a/Documentation/devicetree/bindings/soc/samsung/exynos-pmu.yaml b/Documentation/devicetree/bindings/soc/samsung/exynos-pmu.yaml
> index d124f3ae9fbd..5bd39876e3b3 100644
> --- a/Documentation/devicetree/bindings/soc/samsung/exynos-pmu.yaml
> +++ b/Documentation/devicetree/bindings/soc/samsung/exynos-pmu.yaml
> @@ -176,6 +176,20 @@ allOf:
>        properties:
>          dp-phy: false
>
> +  - if:
> +      properties:
> +        compatible:
> +          contains:
> +            enum:
> +              - samsung,exynos7-pmu
> +    then:
> +      properties:
> +        reboot-mode:
> +          patternProperties:
> +            # Negative look-ahead to disallow unsupported modes. The '$' has to be
> +            # part of lookahead group to work, instead of trailing outside of ().
> +            "^mode-(?!(bootloader$|download$|fastboot$|recovery$))": false
> +
>    - if:
>        properties:
>          compatible:
> @@ -183,6 +197,13 @@ allOf:
>              enum:
>                - google,gs101-pmu
>      then:
> +      properties:
> +        reboot-mode:
> +          patternProperties:
> +            # Negative look-ahead to disallow unsupported modes. The '$' has to be
> +            # part of lookahead group to work, instead of trailing outside of ().
> +            "^mode-(?!(bootloader$|charge$|dm-verity-device-corrupted$|fastboot$|reboot-ab-update$|recovery$)|rescue$|shutdown-thermal$|shutdown-thermal-battery$)": false
> +
>        required:
>          - google,pmu-intr-gen-syscon
>      else:
> --
> 2.53.0
>