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ASoC: dt-bindings: Add Rockchip RK3308 internal audio codec
Add device tree bindings document for the internal audio codec of the
Rockchip RK3308 SoC.
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Luca Ceresoli <luca.ceresoli@bootlin.com>
Link: https://msgid.link/r/20240305-rk3308-audio-codec-v4-2-312acdbe628f@bootlin.com
Signed-off-by: Mark Brown <broonie@kernel.org>
authored by
Luca Ceresoli
and committed by
Mark Brown
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Documentation/devicetree/bindings/sound/rockchip,rk3308-codec.yaml
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Documentation/devicetree/bindings/sound/rockchip,rk3308-codec.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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$id: http://devicetree.org/schemas/sound/rockchip,rk3308-codec.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: Rockchip RK3308 Internal Codec
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description: |
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This is the audio codec embedded in the Rockchip RK3308
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SoC. It has 8 24-bit ADCs and 2 24-bit DACs. The maximum supported
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sampling rate is 192 kHz.
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It is connected internally to one out of a selection of the internal I2S
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controllers.
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The RK3308 audio codec has 8 independent capture channels, but some
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features work on stereo pairs called groups:
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* grp 0 -- MIC1 / MIC2
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* grp 1 -- MIC3 / MIC4
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* grp 2 -- MIC5 / MIC6
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* grp 3 -- MIC7 / MIC8
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maintainers:
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- Luca Ceresoli <luca.ceresoli@bootlin.com>
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properties:
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compatible:
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const: rockchip,rk3308-codec
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reg:
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maxItems: 1
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rockchip,grf:
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$ref: /schemas/types.yaml#/definitions/phandle
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description:
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Phandle to the General Register Files (GRF)
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clocks:
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items:
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- description: clock for TX
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- description: clock for RX
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- description: AHB clock driving the interface
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clock-names:
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items:
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- const: mclk_tx
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- const: mclk_rx
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- const: hclk
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resets:
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maxItems: 1
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reset-names:
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items:
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- const: codec
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"#sound-dai-cells":
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const: 0
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rockchip,micbias-avdd-percent:
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description: |
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Voltage setting for the MICBIAS pins expressed as a percentage of
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AVDD.
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E.g. if rockchip,micbias-avdd-percent = 85 and AVDD = 3v3, then the
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MIC BIAS voltage will be 3.3 V * 85% = 2.805 V.
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enum: [ 50, 55, 60, 65, 70, 75, 80, 85 ]
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required:
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- compatible
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- reg
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- rockchip,grf
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- clocks
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- resets
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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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#include <dt-bindings/clock/rk3308-cru.h>
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audio_codec: audio-codec@ff560000 {
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compatible = "rockchip,rk3308-codec";
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reg = <0xff560000 0x10000>;
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rockchip,grf = <&grf>;
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clock-names = "mclk_tx", "mclk_rx", "hclk";
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clocks = <&cru SCLK_I2S2_8CH_TX_OUT>,
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<&cru SCLK_I2S2_8CH_RX_OUT>,
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<&cru PCLK_ACODEC>;
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reset-names = "codec";
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resets = <&cru SRST_ACODEC_P>;
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#sound-dai-cells = <0>;
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};
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...
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MAINTAINERS
+5
MAINTAINERS
···
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F: Documentation/devicetree/bindings/media/rockchip-rga.yaml
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F: drivers/media/platform/rockchip/rga/
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ROCKCHIP RK3308 INTERNAL AUDIO CODEC
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M: Luca Ceresoli <luca.ceresoli@bootlin.com>
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S: Maintained
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F: Documentation/devicetree/bindings/sound/rockchip,rk3308-codec.yaml
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ROCKCHIP VIDEO DECODER DRIVER
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M: Ezequiel Garcia <ezequiel@vanguardiasur.com.ar>
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L: linux-media@vger.kernel.org