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# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/sound/st,stm32-i2s.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: STMicroelectronics STM32 SPI/I2S Controller
maintainers:
- Olivier Moysan <olivier.moysan@foss.st.com>
description:
The SPI/I2S block supports I2S/PCM protocols when configured on I2S mode.
Only some SPI instances support I2S.
properties:
compatible:
enum:
- st,stm32h7-i2s
- st,stm32mp25-i2s
"#sound-dai-cells":
const: 0
reg:
maxItems: 1
clocks:
items:
- description: clock feeding the peripheral bus interface.
- description: clock feeding the internal clock generator.
- description: I2S parent clock for sampling rates multiple of 8kHz.
- description: I2S parent clock for sampling rates multiple of 11.025kHz.
minItems: 2
clock-names:
items:
- const: pclk
- const: i2sclk
- const: x8k
- const: x11k
minItems: 2
interrupts:
maxItems: 1
dmas:
items:
- description: audio capture DMA.
- description: audio playback DMA.
dma-names:
items:
- const: rx
- const: tx
resets:
maxItems: 1
"#clock-cells":
description: Configure the I2S device as MCLK clock provider.
const: 0
port:
$ref: audio-graph-port.yaml#
unevaluatedProperties: false
access-controllers:
minItems: 1
maxItems: 2
required:
- compatible
- "#sound-dai-cells"
- reg
- clocks
- clock-names
- interrupts
- dmas
- dma-names
allOf:
- $ref: dai-common.yaml#
- if:
properties:
compatible:
contains:
const: st,stm32h7-i2s
then:
properties:
clocks:
minItems: 4
clock-names:
minItems: 4
- if:
properties:
compatible:
contains:
const: st,stm32mp25-i2s
then:
properties:
clocks:
maxItems: 2
clock-names:
maxItems: 2
unevaluatedProperties: false
examples:
- |
#include <dt-bindings/interrupt-controller/arm-gic.h>
#include <dt-bindings/clock/stm32mp1-clks.h>
i2s2: audio-controller@4000b000 {
compatible = "st,stm32h7-i2s";
#sound-dai-cells = <0>;
reg = <0x4000b000 0x400>;
clocks = <&rcc SPI2>, <&rcc SPI2_K>, <&rcc PLL3_Q>, <&rcc PLL3_R>;
clock-names = "pclk", "i2sclk", "x8k", "x11k";
interrupts = <GIC_SPI 35 IRQ_TYPE_LEVEL_HIGH>;
dmas = <&dmamux1 39 0x400 0x01>,
<&dmamux1 40 0x400 0x01>;
dma-names = "rx", "tx";
pinctrl-names = "default";
pinctrl-0 = <&i2s2_pins_a>;
/* assume audio-graph */
port {
codec_endpoint: endpoint {
remote-endpoint = <&codec_endpoint>;
};
};
};
...
|
