Commit 806d4fec authored by Raphael Gallais-Pou's avatar Raphael Gallais-Pou
Browse files

dt-bindings: display: st: add two new compatibles to LTDC device 



The new STMicroelectronics SoC features a display controller similar to
the one used in previous SoCs.  Because there is additional registers,
and different mandatory clocks it is incompatible with existing IPs.  On
STM32MP251, the device only needs two clocks while on STM32MP255 it
needs four.

Add the new names to the list of compatible string and handle each
quirks accordingly.

Acked-by: default avatarPhilippe Cornu <philippe.cornu@foss.st.com>
Reviewed-by: default avatarKrzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20250822-drm-misc-next-v5-1-9c825e28f733@foss.st.com


Signed-off-by: default avatarRaphael Gallais-Pou <raphael.gallais-pou@foss.st.com>
parent 0b6da6d3

Documentation/devicetree/bindings/display/st,stm32-ltdc.yaml

+50 −2
Original line number Diff line number Diff line
@@ -12,7 +12,10 @@ maintainers: 


properties:

  compatible:

    const: st,stm32-ltdc

    enum:

      - st,stm32-ltdc

      - st,stm32mp251-ltdc

      - st,stm32mp255-ltdc



  reg:

    maxItems: 1
@@ -24,11 +27,16 @@ properties: 
    minItems: 1



  clocks:

    maxItems: 1

    minItems: 1

    maxItems: 4



  clock-names:

    items:

      - const: lcd

      - const: bus

      - const: ref

      - const: lvds

    minItems: 1



  resets:

    maxItems: 1
@@ -51,6 +59,46 @@ required: 
  - resets

  - port



allOf:

  - if:

      properties:

        compatible:

          contains:

            enum:

              - st,stm32-ltdc

    then:

      properties:

        clocks:

          maxItems: 1

        clock-names:

          maxItems: 1

  - if:

      properties:

        compatible:

          contains:

            enum:

              - st,stm32mp251-ltdc

    then:

      properties:

        clocks:

          minItems: 2

          maxItems: 2

        clock-names:

          minItems: 2

          maxItems: 2

  - if:

      properties:

        compatible:

          contains:

            enum:

              - st,stm32mp255-ltdc

    then:

      properties:

        clocks:

          minItems: 4

        clock-names:

          minItems: 4



additionalProperties: false



examples: