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ASoC: dt-bindings: fsl_easrc: Add document for EASRC
EASRC (Enhanced Asynchronous Sample Rate Converter) is a new IP module found on i.MX8MN. Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com> Reviewed-by: Rob Herring <robh@kernel.org> Link: https://lore.kernel.org/r/3195cad960113a089d63c10e2268d63b253a69c5.1587038908.git.shengjiu.wang@nxp.com Signed-off-by: Mark Brown <broonie@kernel.org>
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# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) | ||
%YAML 1.2 | ||
--- | ||
$id: http://devicetree.org/schemas/sound/fsl,easrc.yaml# | ||
$schema: http://devicetree.org/meta-schemas/core.yaml# | ||
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title: NXP Asynchronous Sample Rate Converter (ASRC) Controller | ||
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maintainers: | ||
- Shengjiu Wang <shengjiu.wang@nxp.com> | ||
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properties: | ||
$nodename: | ||
pattern: "^easrc@.*" | ||
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compatible: | ||
const: fsl,imx8mn-easrc | ||
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reg: | ||
maxItems: 1 | ||
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interrupts: | ||
maxItems: 1 | ||
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clocks: | ||
items: | ||
- description: Peripheral clock | ||
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clock-names: | ||
items: | ||
- const: mem | ||
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dmas: | ||
maxItems: 8 | ||
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dma-names: | ||
items: | ||
- const: ctx0_rx | ||
- const: ctx0_tx | ||
- const: ctx1_rx | ||
- const: ctx1_tx | ||
- const: ctx2_rx | ||
- const: ctx2_tx | ||
- const: ctx3_rx | ||
- const: ctx3_tx | ||
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firmware-name: | ||
allOf: | ||
- $ref: /schemas/types.yaml#/definitions/string | ||
- const: imx/easrc/easrc-imx8mn.bin | ||
description: The coefficient table for the filters | ||
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fsl,asrc-rate: | ||
allOf: | ||
- $ref: /schemas/types.yaml#/definitions/uint32 | ||
- minimum: 8000 | ||
- maximum: 192000 | ||
description: Defines a mutual sample rate used by DPCM Back Ends | ||
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fsl,asrc-format: | ||
allOf: | ||
- $ref: /schemas/types.yaml#/definitions/uint32 | ||
- enum: [2, 6, 10, 32, 36] | ||
default: 2 | ||
description: | ||
Defines a mutual sample format used by DPCM Back Ends | ||
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required: | ||
- compatible | ||
- reg | ||
- interrupts | ||
- clocks | ||
- clock-names | ||
- dmas | ||
- dma-names | ||
- firmware-name | ||
- fsl,asrc-rate | ||
- fsl,asrc-format | ||
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examples: | ||
- | | ||
#include <dt-bindings/clock/imx8mn-clock.h> | ||
easrc: easrc@300c0000 { | ||
compatible = "fsl,imx8mn-easrc"; | ||
reg = <0x0 0x300c0000 0x0 0x10000>; | ||
interrupts = <0x0 122 0x4>; | ||
clocks = <&clk IMX8MN_CLK_ASRC_ROOT>; | ||
clock-names = "mem"; | ||
dmas = <&sdma2 16 23 0> , <&sdma2 17 23 0>, | ||
<&sdma2 18 23 0> , <&sdma2 19 23 0>, | ||
<&sdma2 20 23 0> , <&sdma2 21 23 0>, | ||
<&sdma2 22 23 0> , <&sdma2 23 23 0>; | ||
dma-names = "ctx0_rx", "ctx0_tx", | ||
"ctx1_rx", "ctx1_tx", | ||
"ctx2_rx", "ctx2_tx", | ||
"ctx3_rx", "ctx3_tx"; | ||
firmware-name = "imx/easrc/easrc-imx8mn.bin"; | ||
fsl,asrc-rate = <8000>; | ||
fsl,asrc-format = <2>; | ||
}; |