Bindings/sound/ti,j721e-cpb-audio.yaml

   1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
   2 # Copyright (C) 2020 Texas Instruments Incorporated
   3 # Author: Peter Ujfalusi <peter.ujfalusi@ti.com>
   4 %YAML 1.2
   5 ---
   6 $id: http://devicetree.org/schemas/sound/ti,j721e-cpb-audio.yaml#
   7 $schema: http://devicetree.org/meta-schemas/core.yaml#
   8
   9 title: Texas Instruments J721e Common Processor Board Audio Support
  10
  11 maintainers:
  12   - Peter Ujfalusi <peter.ujfalusi@gmail.com>
  13
  14 description: |
  15   The audio support on the board is using pcm3168a codec connected to McASP10
  16   serializers in parallel setup.
  17   The pcm3168a SCKI clock is sourced from j721e AUDIO_REFCLK2 pin.
  18   In order to support 48KHz and 44.1KHz family of sampling rates the parent
  19   clock for AUDIO_REFCLK2 needs to be changed between PLL4 (for 48KHz) and
  20   PLL15 (for 44.1KHz). The same PLLs are used for McASP10's AUXCLK clock via
  21   different HSDIVIDER.
  22
  23   Clocking setup for j721e:
  24     48KHz family:
  25     PLL4 ---> PLL4_HSDIV0 ---> MCASP10_AUXCLK ---> McASP10.auxclk
  26           |-> PLL4_HSDIV2 ---> AUDIO_REFCLK2  ---> pcm3168a.SCKI
  27
  28     44.1KHz family:
  29     PLL15 ---> PLL15_HSDIV0 ---> MCASP10_AUXCLK ---> McASP10.auxclk
  30            |-> PLL15_HSDIV2 ---> AUDIO_REFCLK2  ---> pcm3168a.SCKI
  31
  32   Clocking setup for j7200:
  33     48KHz family:
  34     PLL4 ---> PLL4_HSDIV0 ---> MCASP0_AUXCLK ---> McASP0.auxclk
  35           |-> PLL4_HSDIV2 ---> AUDIO_REFCLK2  ---> pcm3168a.SCKI
  36
  37 properties:
  38   compatible:
  39     enum:
  40       - ti,j721e-cpb-audio
  41       - ti,j7200-cpb-audio
  42
  43   model:
  44     $ref: /schemas/types.yaml#/definitions/string
  45     description: User specified audio sound card name
  46
  47   ti,cpb-mcasp:
  48     description: phandle to McASP used on CPB
  49     $ref: /schemas/types.yaml#/definitions/phandle
  50
  51   ti,cpb-codec:
  52     description: phandle to the pcm3168a codec used on the CPB
  53     $ref: /schemas/types.yaml#/definitions/phandle
  54
  55   clocks:
  56     minItems: 4
  57     maxItems: 6
  58
  59   clock-names:
  60     minItems: 4
  61     maxItems: 6
  62
  63 required:
  64   - compatible
  65   - model
  66   - ti,cpb-mcasp
  67   - ti,cpb-codec
  68   - clocks
  69   - clock-names
  70
  71 additionalProperties: false
  72
  73 allOf:
  74   - if:
  75       properties:
  76         compatible:
  77           contains:
  78             const: ti,j721e-cpb-audio
  79
  80     then:
  81       properties:
  82         clocks:
  83           items:
  84             - description: AUXCLK clock for McASP used by CPB audio
  85             - description: Parent for CPB_McASP auxclk (for 48KHz)
  86             - description: Parent for CPB_McASP auxclk (for 44.1KHz)
  87             - description: SCKI clock for the pcm3168a codec on CPB
  88             - description: Parent for CPB_SCKI clock (for 48KHz)
  89             - description: Parent for CPB_SCKI clock (for 44.1KHz)
  90
  91         clock-names:
  92           items:
  93             - const: cpb-mcasp-auxclk
  94             - const: cpb-mcasp-auxclk-48000
  95             - const: cpb-mcasp-auxclk-44100
  96             - const: cpb-codec-scki
  97             - const: cpb-codec-scki-48000
  98             - const: cpb-codec-scki-44100
  99
 100   - if:
 101       properties:
 102         compatible:
 103           contains:
 104             const: ti,j7200-cpb-audio
 105
 106     then:
 107       properties:
 108         clocks:
 109           items:
 110             - description: AUXCLK clock for McASP used by CPB audio
 111             - description: Parent for CPB_McASP auxclk (for 48KHz)
 112             - description: SCKI clock for the pcm3168a codec on CPB
 113             - description: Parent for CPB_SCKI clock (for 48KHz)
 114
 115         clock-names:
 116           items:
 117             - const: cpb-mcasp-auxclk
 118             - const: cpb-mcasp-auxclk-48000
 119             - const: cpb-codec-scki
 120             - const: cpb-codec-scki-48000
 121
 122 examples:
 123   - |+
 124     sound {
 125         compatible = "ti,j721e-cpb-audio";
 126         model = "j721e-cpb";
 127
 128         ti,cpb-mcasp = <&mcasp10>;
 129         ti,cpb-codec = <&pcm3168a_1>;
 130
 131         clocks = <&k3_clks 184 1>,
 132                  <&k3_clks 184 2>, <&k3_clks 184 4>,
 133                  <&k3_clks 157 371>,
 134                  <&k3_clks 157 400>, <&k3_clks 157 401>;
 135         clock-names = "cpb-mcasp-auxclk",
 136                       "cpb-mcasp-auxclk-48000", "cpb-mcasp-auxclk-44100",
 137                       "cpb-codec-scki",
 138                       "cpb-codec-scki-48000", "cpb-codec-scki-44100";
 139     };