xref: /linux/Documentation/devicetree/bindings/sound/st,stm32-i2s.yaml (revision ae22a94997b8a03dcb3c922857c203246711f9d4) 
1# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2%YAML 1.2
3---
4$id: http://devicetree.org/schemas/sound/st,stm32-i2s.yaml#
5$schema: http://devicetree.org/meta-schemas/core.yaml#
6
7title: STMicroelectronics STM32 SPI/I2S Controller
8
9maintainers:
10  - Olivier Moysan <olivier.moysan@foss.st.com>
11
12description:
13  The SPI/I2S block supports I2S/PCM protocols when configured on I2S mode.
14  Only some SPI instances support I2S.
15
16allOf:
17  - $ref: dai-common.yaml#
18
19properties:
20  compatible:
21    enum:
22      - st,stm32h7-i2s
23
24  "#sound-dai-cells":
25    const: 0
26
27  reg:
28    maxItems: 1
29
30  clocks:
31    items:
32      - description: clock feeding the peripheral bus interface.
33      - description: clock feeding the internal clock generator.
34      - description: I2S parent clock for sampling rates multiple of 8kHz.
35      - description: I2S parent clock for sampling rates multiple of 11.025kHz.
36
37  clock-names:
38    items:
39      - const: pclk
40      - const: i2sclk
41      - const: x8k
42      - const: x11k
43
44  interrupts:
45    maxItems: 1
46
47  dmas:
48    items:
49      - description: audio capture DMA.
50      - description: audio playback DMA.
51
52  dma-names:
53    items:
54      - const: rx
55      - const: tx
56
57  resets:
58    maxItems: 1
59
60  "#clock-cells":
61    description: Configure the I2S device as MCLK clock provider.
62    const: 0
63
64  port:
65    $ref: audio-graph-port.yaml#
66    unevaluatedProperties: false
67
68required:
69  - compatible
70  - "#sound-dai-cells"
71  - reg
72  - clocks
73  - clock-names
74  - interrupts
75  - dmas
76  - dma-names
77
78unevaluatedProperties: false
79
80examples:
81  - |
82    #include <dt-bindings/interrupt-controller/arm-gic.h>
83    #include <dt-bindings/clock/stm32mp1-clks.h>
84    i2s2: audio-controller@4000b000 {
85        compatible = "st,stm32h7-i2s";
86        #sound-dai-cells = <0>;
87        reg = <0x4000b000 0x400>;
88        clocks = <&rcc SPI2>, <&rcc SPI2_K>, <&rcc PLL3_Q>, <&rcc PLL3_R>;
89        clock-names = "pclk", "i2sclk", "x8k", "x11k";
90        interrupts = <GIC_SPI 35 IRQ_TYPE_LEVEL_HIGH>;
91        dmas = <&dmamux1 39 0x400 0x01>,
92               <&dmamux1 40 0x400 0x01>;
93        dma-names = "rx", "tx";
94        pinctrl-names = "default";
95        pinctrl-0 = <&i2s2_pins_a>;
96
97        /* assume audio-graph */
98        port {
99            codec_endpoint: endpoint {
100                remote-endpoint = <&codec_endpoint>;
101            };
102        };
103    };
104
105...
106