ASoC: dt-bindings: stm32: convert i2s to json-schema

Convert the STM32 I2S bindings to DT schema format using json-schema.

Signed-off-by: Olivier Moysan <olivier.moysan@st.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20200207120345.24672-1-olivier.moysan@st.com
Signed-off-by: Mark Brown <broonie@kernel.org>
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Olivier Moysan 2020-02-07 13:03:45 +01:00 коммит произвёл Mark Brown
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Коммит 95e9e205fc
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STMicroelectronics STM32 SPI/I2S Controller
The SPI/I2S block supports I2S/PCM protocols when configured on I2S mode.
Only some SPI instances support I2S.
Required properties:
- compatible: Must be "st,stm32h7-i2s"
- reg: Offset and length of the device's register set.
- interrupts: Must contain the interrupt line id.
- clocks: Must contain phandle and clock specifier pairs for each entry
in clock-names.
- clock-names: Must contain "i2sclk", "pclk", "x8k" and "x11k".
"i2sclk": clock which feeds the internal clock generator
"pclk": clock which feeds the peripheral bus interface
"x8k": I2S parent clock for sampling rates multiple of 8kHz.
"x11k": I2S parent clock for sampling rates multiple of 11.025kHz.
- dmas: DMA specifiers for tx and rx dma.
See Documentation/devicetree/bindings/dma/stm32-dma.txt.
- dma-names: Identifier for each DMA request line. Must be "tx" and "rx".
- pinctrl-names: should contain only value "default"
- pinctrl-0: see Documentation/devicetree/bindings/pinctrl/st,stm32-pinctrl.yaml
Optional properties:
- resets: Reference to a reset controller asserting the reset controller
The device node should contain one 'port' child node with one child 'endpoint'
node, according to the bindings defined in Documentation/devicetree/bindings/
graph.txt.
Example:
sound_card {
compatible = "audio-graph-card";
dais = <&i2s2_port>;
};
i2s2: audio-controller@40003800 {
compatible = "st,stm32h7-i2s";
reg = <0x40003800 0x400>;
interrupts = <36>;
clocks = <&rcc PCLK1>, <&rcc SPI2_CK>, <&rcc PLL1_Q>, <&rcc PLL2_P>;
clock-names = "pclk", "i2sclk", "x8k", "x11k";
dmas = <&dmamux2 2 39 0x400 0x1>,
<&dmamux2 3 40 0x400 0x1>;
dma-names = "rx", "tx";
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_i2s2>;
i2s2_port: port@0 {
cpu_endpoint: endpoint {
remote-endpoint = <&codec_endpoint>;
format = "i2s";
};
};
};
audio-codec {
codec_port: port@0 {
codec_endpoint: endpoint {
remote-endpoint = <&cpu_endpoint>;
};
};
};

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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@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
"#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.
clock-names:
items:
- const: pclk
- const: i2sclk
- const: x8k
- const: x11k
interrupts:
maxItems: 1
dmas:
items:
- description: audio capture DMA.
- description: audio playback DMA.
dma-names:
items:
- const: rx
- const: tx
resets:
maxItems: 1
required:
- compatible
- "#sound-dai-cells"
- reg
- clocks
- clock-names
- interrupts
- dmas
- dma-names
additionalProperties: 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>;
};
...