xref: /linux/Documentation/devicetree/bindings/sound/davinci-mcbsp.yaml (revision 24168c5e6dfbdd5b414f048f47f75d64533296ca) 
1# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2%YAML 1.2
3---
4$id: http://devicetree.org/schemas/sound/davinci-mcbsp.yaml#
5$schema: http://devicetree.org/meta-schemas/core.yaml#
6
7title: McBSP Controller for TI SoCs
8
9maintainers:
10  - Bastien Curutchet <bastien.curutchet@bootlin.com>
11
12allOf:
13  - $ref: dai-common.yaml#
14
15properties:
16  compatible:
17    enum:
18      - ti,da850-mcbsp
19
20  reg:
21    minItems: 1
22    items:
23      - description: CFG registers
24      - description: data registers
25
26  reg-names:
27    minItems: 1
28    items:
29      - const: mpu
30      - const: dat
31
32  dmas:
33    items:
34      - description: transmission DMA channel
35      - description: reception DMA channel
36
37  dma-names:
38    items:
39      - const: tx
40      - const: rx
41
42  interrupts:
43    items:
44      - description: RX interrupt
45      - description: TX interrupt
46
47  interrupt-names:
48    items:
49      - const: rx
50      - const: tx
51
52  clocks:
53    minItems: 1
54    items:
55      - description: functional clock
56      - description: external input clock for sample rate generator.
57
58  clock-names:
59    minItems: 1
60    items:
61      - const: fck
62      - const: clks
63
64  power-domains:
65    maxItems: 1
66
67  "#sound-dai-cells":
68    const: 0
69
70  ti,T1-framing-tx:
71    $ref: /schemas/types.yaml#/definitions/flag
72    description:
73      If the property is present, tx data delay is set to 2 bit clock periods.
74      McBSP will insert a blank period (high-impedance period) before the first
75      data bit. This can be used to interface to T1-framing devices.
76
77  ti,T1-framing-rx:
78    $ref: /schemas/types.yaml#/definitions/flag
79    description:
80      If the property is present, rx data delay is set to 2 bit clock periods.
81      McBSP will discard the bit preceding the data stream (called framing bit).
82      This can be used to interface to T1-framing devices.
83
84required:
85  - "#sound-dai-cells"
86  - compatible
87  - reg
88  - reg-names
89  - dmas
90  - dma-names
91  - clocks
92
93unevaluatedProperties: false
94
95examples:
96  - |
97    mcbsp0@1d10000 {
98      #sound-dai-cells = <0>;
99      compatible = "ti,da850-mcbsp";
100      pinctrl-names = "default";
101      pinctrl-0 = <&mcbsp0_pins>;
102
103      reg = <0x111000 0x1000>,
104            <0x311000 0x1000>;
105      reg-names = "mpu", "dat";
106      interrupts = <97>, <98>;
107      interrupt-names = "rx", "tx";
108      dmas = <&edma0 3 1>,
109             <&edma0 2 1>;
110      dma-names = "tx", "rx";
111
112      clocks = <&psc1 14>;
113    };
114