lkml.org 
[lkml]   [2022]   [Jun]   [9]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [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
>
>

\
 
 \ /
  Last update: 2022-06-09 20:45    [W:0.152 / U:0.048 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site