Re: [RFC PATCH v2 1/5] dt-bindings: sound: Add Apple MCA I2S transceiver

On Mon, Jun 06, 2022 at 09:19:06PM +0200, Martin Povišer wrote:

Add binding schema for MCA I2S transceiver found on Apple M1 and other chips.

Signed-off-by: Martin Povišer povik+lin@cutebit.org

.../devicetree/bindings/sound/apple,mca.yaml | 102 ++++++++++++++++++ 1 file changed, 102 insertions(+) create mode 100644 Documentation/devicetree/bindings/sound/apple,mca.yaml

diff --git a/Documentation/devicetree/bindings/sound/apple,mca.yaml b/Documentation/devicetree/bindings/sound/apple,mca.yaml new file mode 100644 index 000000000000..c8a36d8c38ad --- /dev/null +++ b/Documentation/devicetree/bindings/sound/apple,mca.yaml @@ -0,0 +1,102 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/sound/apple,mca.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml#

+title: Apple MCA I2S transceiver

+description: |

• MCA is an I2S transceiver peripheral found on M1 and other Apple chips. It is
• composed of a number of identical clusters which can operate independently
• or in an interlinked fashion. Up to 6 clusters have been seen on an MCA.

+maintainers:

• • Martin Povišer povik+lin@cutebit.org

+properties:

• compatible:
• items:

•  - enum:
  

•      - apple,t8103-mca
  

•      - apple,t6000-mca
  

•  - const: apple,mca
  

• reg:
• minItems: 2
• maxItems: 2

Need to define what each entry is.

• interrupts:
• maxItems: 6
• description: |

•  One interrupt per each cluster
  

• "#address-cells":
• const: 1
• "#size-cells":
• const: 0
• dmas:
• minItems: 16
• maxItems: 24
• description: |

•  DMA channels associated to the SERDES units within the peripheral. They
  

•  are listed in groups of four per cluster, and within the cluster they are
  

•  given in order TXA, RXA, TXB, RXB of the respective SERDES units.
  

• dma-names:
• minItems: 16
• maxItems: 24
• description: |

•  Names for the DMA channels: 'tx'/'rx', then cluster number, then 'a'/'b'
  

•  based on the associated SERDES unit.
  

Express as a schema:

items: pattern: '^(tx|rx)[0-5][ab]$'

• clocks:
• minItems: 4
• maxItems: 6
• description: |

•  Clusters' input reference clock.
  

• power-domains:
• minItems: 5
• maxItems: 7
• description: |

•  First the overall power domain for register access, then the power
  

•  domains of individual clusters for their operation.
  

• "#sound-dai-cells":
• const: 1

+required:

• • compatible
• • reg
• • dmas
• • dma-names
• • clocks
• • power-domains
• • '#sound-dai-cells'

+additionalProperties: false

+examples:

• • |
• mca: mca@9b600000 {

•  compatible = "apple,t6000-mca", "apple,mca";
  

•  reg = <0x9b600000 0x10000>,
  

•        <0x9b500000 0x20000>;
  

•  clocks = <&nco 0>, <&nco 1>, <&nco 2>, <&nco 3>;
  

•  power-domains = <&ps_audio_p>, <&ps_mca0>, <&ps_mca1>,
  

•                  <&ps_mca2>, <&ps_mca3>;
  

•  dmas = <&admac 0>, <&admac 1>, <&admac 2>, <&admac 3>,
  

•         <&admac 4>, <&admac 5>, <&admac 6>, <&admac 7>,
  

•         <&admac 8>, <&admac 9>, <&admac 10>, <&admac 11>,
  

•         <&admac 12>, <&admac 13>, <&admac 14>, <&admac 15>;
  

•  dma-names = "tx0a", "rx0a", "tx0b", "rx0b",
  

•              "tx1a", "rx1a", "tx1b", "rx1b",
  

•              "tx2a", "rx2a", "tx2b", "rx2b",
  

•              "tx3a", "rx3a", "tx3b", "rx3b";
  

•  #sound-dai-cells = <1>;
  

• };

-- 2.33.0