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+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/sound/imx-audio-card.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: NXP i.MX audio sound card.
+
+maintainers:
+ - Shengjiu Wang <shengjiu.wang@nxp.com>
+
+properties:
+ compatible:
+ enum:
+ - fsl,imx-audio-card
+
+ model:
+ $ref: /schemas/types.yaml#/definitions/string
+ description: User specified audio sound card name
+
+ audio-routing:
+ $ref: /schemas/types.yaml#/definitions/non-unique-string-array
+ description:
+ A list of the connections between audio components. Each entry is a
+ pair of strings, the first being the connection's sink, the second
+ being the connection's source. Valid names could be power supplies,
+ MicBias of codec and the jacks on the board.
+
+patternProperties:
+ ".*-dai-link$":
+ description:
+ Each subnode represents a dai link. Subnodes of each dai links would be
+ cpu/codec dais.
+
+ type: object
+
+ properties:
+ link-name:
+ description: Indicates dai-link name and PCM stream name.
+ $ref: /schemas/types.yaml#/definitions/string
+ maxItems: 1
+
+ format:
+ description: audio format.
+ items:
+ enum:
+ - i2s
+ - dsp_b
+
+ dai-tdm-slot-num:
+ description: see tdm-slot.txt.
+ $ref: /schemas/types.yaml#/definitions/uint32
+
+ dai-tdm-slot-width:
+ description: see tdm-slot.txt.
+ $ref: /schemas/types.yaml#/definitions/uint32
+
+ cpu:
+ description: Holds subnode which indicates cpu dai.
+ type: object
+ properties:
+ sound-dai: true
+
+ codec:
+ description: Holds subnode which indicates codec dai.
+ type: object
+ properties:
+ sound-dai: true
+
+ fsl,mclk-equal-bclk:
+ description: Indicates mclk can be equal to bclk, especially for sai interface
+ $ref: /schemas/types.yaml#/definitions/flag
+
+ required:
+ - link-name
+ - cpu
+
+ additionalProperties: false
+
+required:
+ - compatible
+ - model
+
+additionalProperties: false
+
+examples:
+ - |
+ sound-ak4458 {
+ compatible = "fsl,imx-audio-card";
+ model = "ak4458-audio";
+ pri-dai-link {
+ link-name = "akcodec";
+ format = "i2s";
+ fsl,mclk-equal-bclk;
+ cpu {
+ sound-dai = <&sai1>;
+ };
+ codec {
+ sound-dai = <&ak4458_1>, <&ak4458_2>;
+ };
+ };
+ fe-dai-link {
+ link-name = "HiFi-ASRC-FE";
+ format = "i2s";
+ cpu {
+ sound-dai = <&easrc>;
+ };
+ };
+ be-dai-link {
+ link-name = "HiFi-ASRC-BE";
+ format = "dsp_b";
+ dai-tdm-slot-num = <8>;
+ dai-tdm-slot-width = <32>;
+ fsl,mclk-equal-bclk;
+ cpu {
+ sound-dai = <&sai1>;
+ };
+ codec {
+ sound-dai = <&ak4458_1>, <&ak4458_2>;
+ };
+ };
+ };
Imx-card is a new added machine driver for supporting ak4458/ak5558/ak5552/ak4497 codec on i.MX platforms. But these DAC/ADCs are not only supported codecs. This machine driver is designed to be a more common machine driver for i.MX platform, it can support widely cpu dai interface and codec dai interface. Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com> --- changes in v3: - use a generic compatible string as Rob's comments. - change the file name changes in v2: - update doc accoring to Rob's comment, use the common porperties. .../bindings/sound/imx-audio-card.yaml | 122 ++++++++++++++++++ 1 file changed, 122 insertions(+) create mode 100644 Documentation/devicetree/bindings/sound/imx-audio-card.yaml