Re: [PATCH 1/3] dt-bindings: power: reset: Convert mode-.* properties to array

From: Rob Herring
Date: Mon Nov 20 2023 - 10:27:48 EST


On Fri, Nov 17, 2023 at 01:18:46PM -0800, Elliot Berman wrote:
> PSCI reboot mode will map a mode name to multiple magic values instead
> of just one. Convert the mode-.* property to an array with default
> number of items limited to 1.
>
> Signed-off-by: Elliot Berman <quic_eberman@xxxxxxxxxxx>
> ---
> Documentation/devicetree/bindings/power/reset/reboot-mode.yaml | 7 +++++--
> 1 file changed, 5 insertions(+), 2 deletions(-)
>
> diff --git a/Documentation/devicetree/bindings/power/reset/reboot-mode.yaml b/Documentation/devicetree/bindings/power/reset/reboot-mode.yaml
> index ad0a0b95cec1..2c786e783464 100644
> --- a/Documentation/devicetree/bindings/power/reset/reboot-mode.yaml
> +++ b/Documentation/devicetree/bindings/power/reset/reboot-mode.yaml
> @@ -28,13 +28,16 @@ description: |
>
> properties:
> mode-normal:
> - $ref: /schemas/types.yaml#/definitions/uint32
> + $ref: "#/patternProperties/^mode-.*$"
> description:
> Default value to set on a reboot if no command was provided.
>
> patternProperties:
> "^mode-.*$":
> - $ref: /schemas/types.yaml#/definitions/uint32
> + $ref: /schemas/types.yaml#/definitions/uint32-array
> + # Default to one value. Bindings that reference this schema could override.
> + minItems: 1
> + maxItems: 1

There are no overrides in json-schema, so this won't work.

It happens to work though. It has to do with how we process the schemas
because every integer property is decoded into a 2 dimensional array. So
we process the schemas to convert schemas for scalars and arrays into
a matrix. This hit a corner case where we bail on doing any fixup when
maxItems is 1, but really it should be transformed into:

maxItems: 1
items:
maxItems: 1

Which would then fail on your case with 2 entries. You need 'maxItems:
1' everywhere just 1 entry is expected (e.g. mode-normal) and no
constraints here.

Rob


>
> additionalProperties: true
>
>
> --
> 2.41.0
>