dt-bindings: sound: Convert Allwinner I2S binding to YAML
The Allwinner SoCs feature an I2S controller across multiple SoC generations. However, earlier generations were a bit simpler than the subsequent ones, and for example would always have RX and TX capabilities, and no reset lines. Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com> Reviewed-by: Rob Herring <robh@kernel.org> Signed-off-by: Mark Brown <broonie@kernel.org>
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Maxime Ripard
Mark Brown
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# SPDX-License-Identifier: (GPL-2.0+ OR BSD-2-Clause)
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/sound/allwinner,sun4i-a10-i2s.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: Allwinner A10 I2S Controller Device Tree Bindings
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maintainers:
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- Chen-Yu Tsai <wens@csie.org>
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- Maxime Ripard <maxime.ripard@bootlin.com>
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properties:
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"#sound-dai-cells":
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const: 0
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compatible:
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oneOf:
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- const: allwinner,sun4i-a10-i2s
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- const: allwinner,sun6i-a31-i2s
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- const: allwinner,sun8i-a83t-i2s
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- const: allwinner,sun8i-h3-i2s
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- const: allwinner,sun50i-a64-codec-i2s
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- items:
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- const: allwinner,sun50i-a64-i2s
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- const: allwinner,sun8i-h3-i2s
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reg:
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maxItems: 1
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interrupts:
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maxItems: 1
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clocks:
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items:
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- description: Bus Clock
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- description: Module Clock
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clock-names:
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items:
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- const: apb
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- const: mod
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dmas:
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items:
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- description: RX DMA Channel
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- description: TX DMA Channel
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dma-names:
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items:
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- const: rx
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- const: tx
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# Even though it only applies to subschemas under the conditionals,
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# not listing them here will trigger a warning because of the
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# additionalsProperties set to false.
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resets:
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maxItems: 1
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allOf:
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- if:
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properties:
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compatible:
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contains:
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enum:
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- allwinner,sun6i-a31-i2s
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- allwinner,sun8i-a83t-i2s
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- allwinner,sun8i-h3-i2s
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- allwinner,sun50i-a64-codec-i2s
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then:
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required:
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- resets
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required:
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- "#sound-dai-cells"
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- compatible
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- reg
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- interrupts
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- clocks
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- clock-names
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- dmas
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- dma-names
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additionalProperties: false
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examples:
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- |
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i2s0: i2s@1c22400 {
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#sound-dai-cells = <0>;
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compatible = "allwinner,sun4i-a10-i2s";
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reg = <0x01c22400 0x400>;
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interrupts = <0 16 4>;
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clocks = <&apb0_gates 3>, <&i2s0_clk>;
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clock-names = "apb", "mod";
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dmas = <&dma 0 3>, <&dma 0 3>;
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dma-names = "rx", "tx";
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};
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...
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@ -1,45 +0,0 @@
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* Allwinner A10 I2S controller
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The I2S bus (Inter-IC sound bus) is a serial link for digital
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audio data transfer between devices in the system.
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Required properties:
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- compatible: should be one of the following:
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- "allwinner,sun4i-a10-i2s"
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- "allwinner,sun6i-a31-i2s"
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- "allwinner,sun8i-a83t-i2s"
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- "allwinner,sun8i-h3-i2s"
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- "allwinner,sun50i-a64-codec-i2s"
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- reg: physical base address of the controller and length of memory mapped
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region.
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- interrupts: should contain the I2S interrupt.
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- dmas: DMA specifiers for tx and rx dma. See the DMA client binding,
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Documentation/devicetree/bindings/dma/dma.txt
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- dma-names: should include "tx" and "rx".
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- clocks: a list of phandle + clock-specifer pairs, one for each entry in clock-names.
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- clock-names: should contain the following:
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- "apb" : clock for the I2S bus interface
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- "mod" : module clock for the I2S controller
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- #sound-dai-cells : Must be equal to 0
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Required properties for the following compatibles:
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- "allwinner,sun6i-a31-i2s"
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- "allwinner,sun8i-a83t-i2s"
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- "allwinner,sun8i-h3-i2s"
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- "allwinner,sun50i-a64-codec-i2s"
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- resets: phandle to the reset line for this codec
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Example:
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i2s0: i2s@1c22400 {
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#sound-dai-cells = <0>;
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compatible = "allwinner,sun4i-a10-i2s";
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reg = <0x01c22400 0x400>;
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interrupts = <GIC_SPI 16 IRQ_TYPE_LEVEL_HIGH>;
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clocks = <&apb0_gates 3>, <&i2s0_clk>;
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clock-names = "apb", "mod";
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dmas = <&dma SUN4I_DMA_NORMAL 3>,
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<&dma SUN4I_DMA_NORMAL 3>;
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dma-names = "rx", "tx";
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};
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