132 lines
3.1 KiB
YAML
132 lines
3.1 KiB
YAML
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# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/sound/apple,mca.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: Apple MCA I2S transceiver
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description: |
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MCA is an I2S transceiver peripheral found on M1 and other Apple chips. It is
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composed of a number of identical clusters which can operate independently
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or in an interlinked fashion. Up to 6 clusters have been seen on an MCA.
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maintainers:
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- Martin Povišer <povik+lin@cutebit.org>
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properties:
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compatible:
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items:
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- enum:
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- apple,t6000-mca
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- apple,t8103-mca
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- const: apple,mca
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reg:
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items:
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- description: Register region of the MCA clusters proper
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- description: Register region of the DMA glue and its FIFOs
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interrupts:
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minItems: 4
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maxItems: 6
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description:
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One interrupt per each cluster
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'#address-cells':
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const: 1
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'#size-cells':
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const: 0
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dmas:
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minItems: 16
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maxItems: 24
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description:
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DMA channels corresponding to the SERDES units in the peripheral. They are
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listed in groups of four per cluster, and within the group they are given
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as associated to the TXA, RXA, TXB, RXB units.
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dma-names:
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minItems: 16
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items:
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- const: tx0a
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- const: rx0a
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- const: tx0b
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- const: rx0b
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- const: tx1a
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- const: rx1a
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- const: tx1b
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- const: rx1b
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- const: tx2a
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- const: rx2a
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- const: tx2b
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- const: rx2b
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- const: tx3a
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- const: rx3a
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- const: tx3b
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- const: rx3b
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- const: tx4a
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- const: rx4a
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- const: tx4b
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- const: rx4b
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- const: tx5a
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- const: rx5a
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- const: tx5b
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- const: rx5b
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description: |
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Names for the DMA channels: 'tx'/'rx', then cluster number, then 'a'/'b'
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based on the associated SERDES unit.
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clocks:
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minItems: 4
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maxItems: 6
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description:
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Clusters' input reference clock.
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resets:
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maxItems: 1
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power-domains:
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minItems: 5
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maxItems: 7
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description:
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First a general power domain for register access, then the power
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domains of individual clusters for their operation.
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'#sound-dai-cells':
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const: 1
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required:
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- compatible
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- reg
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- dmas
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- dma-names
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- clocks
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- power-domains
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- '#sound-dai-cells'
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additionalProperties: false
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examples:
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- |
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mca: i2s@9b600000 {
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compatible = "apple,t6000-mca", "apple,mca";
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reg = <0x9b600000 0x10000>,
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<0x9b200000 0x20000>;
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clocks = <&nco 0>, <&nco 1>, <&nco 2>, <&nco 3>;
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power-domains = <&ps_audio_p>, <&ps_mca0>, <&ps_mca1>,
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<&ps_mca2>, <&ps_mca3>;
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dmas = <&admac 0>, <&admac 1>, <&admac 2>, <&admac 3>,
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<&admac 4>, <&admac 5>, <&admac 6>, <&admac 7>,
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<&admac 8>, <&admac 9>, <&admac 10>, <&admac 11>,
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<&admac 12>, <&admac 13>, <&admac 14>, <&admac 15>;
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dma-names = "tx0a", "rx0a", "tx0b", "rx0b",
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"tx1a", "rx1a", "tx1b", "rx1b",
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"tx2a", "rx2a", "tx2b", "rx2b",
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"tx3a", "rx3a", "tx3b", "rx3b";
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#sound-dai-cells = <1>;
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};
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