| Tom Rini | 53633a8 | 2024-02-29 12:33:36 -0500 | [diff] [blame] | 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 | |
| 7 | title: STMicroelectronics STM32 SPI/I2S Controller |
| 8 | |
| 9 | maintainers: |
| 10 | - Olivier Moysan <olivier.moysan@foss.st.com> |
| 11 | |
| 12 | description: |
| 13 | The SPI/I2S block supports I2S/PCM protocols when configured on I2S mode. |
| 14 | Only some SPI instances support I2S. |
| 15 | |
| 16 | allOf: |
| 17 | - $ref: dai-common.yaml# |
| 18 | |
| 19 | properties: |
| 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 | |
| 68 | required: |
| 69 | - compatible |
| 70 | - "#sound-dai-cells" |
| 71 | - reg |
| 72 | - clocks |
| 73 | - clock-names |
| 74 | - interrupts |
| 75 | - dmas |
| 76 | - dma-names |
| 77 | |
| 78 | unevaluatedProperties: false |
| 79 | |
| 80 | examples: |
| 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 | ... |