linux-kernel - Re: [PATCH v3 09/13] ASoC: dt-bindings: tegra: Add schema for audio graph card

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Date:   Tue, 6 Oct 2020 15:34:33 -0500
From:   Rob Herring <robh@...nel.org>
To:     Sameer Pujar <spujar@...dia.com>
Cc:     broonie@...nel.org, lgirdwood@...il.com,
        kuninori.morimoto.gx@...esas.com,
        pierre-louis.bossart@...ux.intel.com, perex@...ex.cz,
        tiwai@...e.com, thierry.reding@...il.com, jonathanh@...dia.com,
        alsa-devel@...a-project.org, devicetree@...r.kernel.org,
        linux-tegra@...r.kernel.org, linux-kernel@...r.kernel.org,
        sharadg@...dia.com, mkumard@...dia.com, viswanathl@...dia.com,
        rlokhande@...dia.com, dramesh@...dia.com, atalambedu@...dia.com,
        nwartikar@...dia.com, swarren@...dia.com, nicoleotsuka@...il.com
Subject: Re: [PATCH v3 09/13] ASoC: dt-bindings: tegra: Add schema for audio
 graph card

On Thu, Oct 01, 2020 at 11:03:03PM +0530, Sameer Pujar wrote:
> Add YAML schema for Tegra audio graph sound card DT bindings. It uses the
> same DT bindings provided by generic audio graph driver. Along with this
> few standard clock DT bindings are added which are specifically required
> for Tegra audio.
> 
> Signed-off-by: Sameer Pujar <spujar@...dia.com>
> ---
>  .../sound/nvidia,tegra-audio-graph-card.yaml       | 70 ++++++++++++++++++++++
>  1 file changed, 70 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/sound/nvidia,tegra-audio-graph-card.yaml
> 
> diff --git a/Documentation/devicetree/bindings/sound/nvidia,tegra-audio-graph-card.yaml b/Documentation/devicetree/bindings/sound/nvidia,tegra-audio-graph-card.yaml
> new file mode 100644
> index 0000000..b73fbe5
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/sound/nvidia,tegra-audio-graph-card.yaml
> @@ -0,0 +1,70 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/sound/nvidia,tegra-audio-graph-card.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Audio Graph based Tegra sound card driver
> +
> +description: |
> +  This is based on generic audio graph card driver along with additional
> +  customizations for Tegra platforms. It uses the same bindings with
> +  additional standard clock DT bindings required for Tegra.
> +
> +  See{LINUX}/Documentation/devicetree/bindings/sound/audio-graph-card.txt
> +
> +maintainers:
> +  - Jon Hunter <jonathanh@...dia.com>
> +  - Sameer Pujar <spujar@...dia.com>
> +
> +properties:
> +  compatible:
> +    oneOf:
> +      - const: nvidia,tegra210-audio-graph-card
> +      - const: nvidia,tegra186-audio-graph-card
> +
> +  clocks:
> +   minItems: 2
> +
> +  clock-names:
> +   minItems: 2
> +   items:
> +     - const: pll_a
> +     - const: plla_out0
> +
> +  assigned-clocks:
> +    minItems: 1
> +    maxItems: 3
> +
> +  assigned-clock-parents:
> +    minItems: 1
> +    maxItems: 3
> +
> +  assigned-clock-rates:
> +    minItems: 1
> +    maxItems: 3
> +
> +required:
> +  - compatible
> +  - clocks
> +  - clock-names
> +  - assigned-clocks
> +  - assigned-clock-parents

Where's the graph? You need to define the ports and reference the common 
schema.

> +
> +examples:
> +  - |
> +    #include<dt-bindings/clock/tegra210-car.h>
> +
> +    tegra_sound {
> +        compatible = "nvidia,tegra210-audio-graph-card";
> +        clocks = <&tegra_car TEGRA210_CLK_PLL_A>,
> +                 <&tegra_car TEGRA210_CLK_PLL_A_OUT0>;
> +        clock-names = "pll_a", "plla_out0";
> +        assigned-clocks = <&tegra_car TEGRA210_CLK_PLL_A>,
> +                          <&tegra_car TEGRA210_CLK_PLL_A_OUT0>,
> +                          <&tegra_car TEGRA210_CLK_EXTERN1>;
> +        assigned-clock-parents = <0>, <0>, <&tegra_car TEGRA210_CLK_PLL_A_OUT0>;
> +        assigned-clock-rates = <368640000>, <49152000>, <12288000>;
> +    };
> +
> +...
> -- 
> 2.7.4
>