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 16properties: 17 compatible: 18 enum: 19 - st,stm32h7-i2s 20 21 "#sound-dai-cells": 22 const: 0 23 24 reg: 25 maxItems: 1 26 27 clocks: 28 items: 29 - description: clock feeding the peripheral bus interface. 30 - description: clock feeding the internal clock generator. 31 - description: I2S parent clock for sampling rates multiple of 8kHz. 32 - description: I2S parent clock for sampling rates multiple of 11.025kHz. 33 34 clock-names: 35 items: 36 - const: pclk 37 - const: i2sclk 38 - const: x8k 39 - const: x11k 40 41 interrupts: 42 maxItems: 1 43 44 dmas: 45 items: 46 - description: audio capture DMA. 47 - description: audio playback DMA. 48 49 dma-names: 50 items: 51 - const: rx 52 - const: tx 53 54 resets: 55 maxItems: 1 56 57 "#clock-cells": 58 description: Configure the I2S device as MCLK clock provider. 59 const: 0 60 61required: 62 - compatible 63 - "#sound-dai-cells" 64 - reg 65 - clocks 66 - clock-names 67 - interrupts 68 - dmas 69 - dma-names 70 71additionalProperties: false 72 73examples: 74 - | 75 #include <dt-bindings/interrupt-controller/arm-gic.h> 76 #include <dt-bindings/clock/stm32mp1-clks.h> 77 i2s2: audio-controller@4000b000 { 78 compatible = "st,stm32h7-i2s"; 79 #sound-dai-cells = <0>; 80 reg = <0x4000b000 0x400>; 81 clocks = <&rcc SPI2>, <&rcc SPI2_K>, <&rcc PLL3_Q>, <&rcc PLL3_R>; 82 clock-names = "pclk", "i2sclk", "x8k", "x11k"; 83 interrupts = <GIC_SPI 35 IRQ_TYPE_LEVEL_HIGH>; 84 dmas = <&dmamux1 39 0x400 0x01>, 85 <&dmamux1 40 0x400 0x01>; 86 dma-names = "rx", "tx"; 87 pinctrl-names = "default"; 88 pinctrl-0 = <&i2s2_pins_a>; 89 }; 90 91... 92