Unverified Commit bd60f94a authored by Clément Le Goffic's avatar Clément Le Goffic Committed by Mark Brown
Browse files

spi: dt-bindings: stm32: update bindings with SPI Rx DMA-MDMA chaining 



Add MDMA channel, and new sram property which are mandatory to enable
SPI Rx DMA-MDMA chaining.

Signed-off-by: default avatarClément Le Goffic <clement.legoffic@foss.st.com>
Link: https://patch.msgid.link/20250616-spi-upstream-v1-3-7e8593f3f75d@foss.st.com


Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent 4956bf44

Documentation/devicetree/bindings/spi/st,stm32-spi.yaml

+46 −2
Original line number Diff line number Diff line
@@ -18,6 +18,38 @@ maintainers: 


allOf:

  - $ref: spi-controller.yaml#

  - if:

      properties:

        compatible:

          contains:

            const: st,stm32f4-spi



    then:

      properties:

        st,spi-midi-ns: false

        sram: false

        dmas:

          maxItems: 2

        dma-names:

          items:

            - const: rx

            - const: tx



  - if:

      properties:

        compatible:

          contains:

            const: st,stm32mp25-spi



    then:

      properties:

        sram: false

        dmas:

          maxItems: 2

        dma-names:

          items:

            - const: rx

            - const: tx



properties:

  compatible:
@@ -41,16 +73,28 @@ properties: 


  dmas:

    description: |

      DMA specifiers for tx and rx dma. DMA fifo mode must be used. See

      the STM32 DMA controllers bindings Documentation/devicetree/bindings/dma/stm32/*.yaml.

      DMA specifiers for tx and rx channels. DMA fifo mode must be used. See

      the STM32 DMA bindings Documentation/devicetree/bindings/dma/stm32/st,*dma.yaml

    minItems: 2

    items:

      - description: rx DMA channel

      - description: tx DMA channel

      - description: rxm2m MDMA channel



  dma-names:

    minItems: 2

    items:

      - const: rx

      - const: tx

      - const: rxm2m



  sram:

    $ref: /schemas/types.yaml#/definitions/phandle

    description: |

      Phandles to a reserved SRAM region which is used as temporary

      storage memory between DMA and MDMA engines.

      The region should be defined as child node of the AHB SRAM node

      as per the generic bindings in Documentation/devicetree/bindings/sram/sram.yaml



  access-controllers:

    minItems: 1