Based on kernel version 6.10
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 | # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) %YAML 1.2 --- $id: http://devicetree.org/schemas/sound/fsl,audmix.yaml# $schema: http://devicetree.org/meta-schemas/core.yaml# title: NXP Audio Mixer (AUDMIX). maintainers: - Shengjiu Wang <shengjiu.wang@nxp.com> - Frank Li <Frank.Li@nxp.com> description: | The Audio Mixer is a on-chip functional module that allows mixing of two audio streams into a single audio stream. Audio Mixer has two input serial audio interfaces. These are driven by two Synchronous Audio interface modules (SAI). Each input serial interface carries 8 audio channels in its frame in TDM manner. Mixer mixes audio samples of corresponding channels from two interfaces into a single sample. Before mixing, audio samples of two inputs can be attenuated based on configuration. The output of the Audio Mixer is also a serial audio interface. Like input interfaces it has the same TDM frame format. This output is used to drive the serial DAC TDM interface of audio codec and also sent to the external pins along with the receive path of normal audio SAI module for readback by the CPU. The output of Audio Mixer can be selected from any of the three streams - serial audio input 1 - serial audio input 2 - mixed audio Mixing operation is independent of audio sample rate but the two audio input streams must have same audio sample rate with same number of channels in TDM frame to be eligible for mixing. properties: compatible: const: fsl,imx8qm-audmix reg: maxItems: 1 clocks: maxItems: 1 clock-names: items: - const: ipg power-domains: maxItems: 1 dais: description: contain a list of phandles to AUDMIX connected DAIs. $ref: /schemas/types.yaml#/definitions/phandle-array minItems: 2 items: - description: the AUDMIX output maxItems: 1 - description: serial audio input 1 maxItems: 1 - description: serial audio input 2 maxItems: 1 required: - compatible - reg - clocks - clock-names - power-domains - dais unevaluatedProperties: false examples: - | audmix@59840000 { compatible = "fsl,imx8qm-audmix"; reg = <0x59840000 0x10000>; clocks = <&amix_lpcg 0>; clock-names = "ipg"; power-domains = <&pd_audmix>; dais = <&sai4>, <&sai5>; }; |