xref: /linux/Documentation/devicetree/bindings/sound/ti,j721e-cpb-audio.yaml (revision ae22a94997b8a03dcb3c922857c203246711f9d4) 
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
9title: Texas Instruments J721e Common Processor Board Audio Support
10
11maintainers:
12  - Peter Ujfalusi <peter.ujfalusi@gmail.com>
13
14description: |
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
37properties:
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
63required:
64  - compatible
65  - model
66  - ti,cpb-mcasp
67  - ti,cpb-codec
68  - clocks
69  - clock-names
70
71additionalProperties: false
72
73allOf:
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
122examples:
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    };
140