ASoC: dt-bindings: rockchip: Convert pdm bindings to yaml
This patch converts pdm bindings to yaml. Signed-off-by: Sugar Zhang <sugar.zhang@rock-chips.com> Reviewed-by: Rob Herring <robh@kernel.org> Link: https://lore.kernel.org/r/1630675438-3418-2-git-send-email-sugar.zhang@rock-chips.com Signed-off-by: Mark Brown <broonie@kernel.org>
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Sugar Zhang
Mark Brown
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* Rockchip PDM controller
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Required properties:
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- compatible: "rockchip,pdm"
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- "rockchip,px30-pdm"
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- "rockchip,rk1808-pdm"
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- "rockchip,rk3308-pdm"
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- "rockchip,rk3568-pdm"
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- "rockchip,rv1126-pdm"
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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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- dmas: DMA specifiers for 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 "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 following:
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- "pdm_hclk": clock for PDM BUS
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- "pdm_clk" : clock for PDM controller
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- resets: a list of phandle + reset-specifer paris, one for each entry in reset-names.
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- reset-names: reset names, should include "pdm-m".
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- pinctrl-names: Must contain a "default" entry.
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- pinctrl-N: One property must exist for each entry in
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pinctrl-names. See ../pinctrl/pinctrl-bindings.txt
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for details of the property values.
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Optional properties:
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- rockchip,path-map: This is a variable length array, that shows the mapping
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of SDIx to PATHx. By default, they are one-to-one mapping as follows:
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path0 <-- sdi0
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path1 <-- sdi1
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path2 <-- sdi2
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path3 <-- sdi3
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e.g. "rockchip,path-map = <3 2 1 0>" means the mapping as follows:
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path0 <-- sdi3
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path1 <-- sdi2
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path2 <-- sdi1
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path3 <-- sdi0
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Example for rk3328 PDM controller:
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pdm: pdm@ff040000 {
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compatible = "rockchip,pdm";
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reg = <0x0 0xff040000 0x0 0x1000>;
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clocks = <&clk_pdm>, <&clk_gates28 0>;
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clock-names = "pdm_clk", "pdm_hclk";
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dmas = <&pdma 16>;
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#dma-cells = <1>;
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dma-names = "rx";
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pinctrl-names = "default", "sleep";
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pinctrl-0 = <&pdmm0_clk
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&pdmm0_sdi0
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&pdmm0_sdi1
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&pdmm0_sdi2
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&pdmm0_sdi3>;
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pinctrl-1 = <&pdmm0_clk_sleep
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&pdmm0_sdi0_sleep
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&pdmm0_sdi1_sleep
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&pdmm0_sdi2_sleep
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&pdmm0_sdi3_sleep>;
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};
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120
Documentation/devicetree/bindings/sound/rockchip,pdm.yaml
Normal file
120
Documentation/devicetree/bindings/sound/rockchip,pdm.yaml
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# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/sound/rockchip,pdm.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: Rockchip PDM controller
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description:
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The Pulse Density Modulation Interface Controller (PDMC) is
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a PDM interface controller and decoder that support PDM format.
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It integrates a clock generator driving the PDM microphone
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and embeds filters which decimate the incoming bit stream to
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obtain most common audio rates.
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maintainers:
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- Heiko Stuebner <heiko@sntech.de>
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properties:
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compatible:
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enum:
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- rockchip,pdm
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- rockchip,px30-pdm
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- rockchip,rk1808-pdm
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- rockchip,rk3308-pdm
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- rockchip,rk3568-pdm
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- rockchip,rv1126-pdm
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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: clock for PDM controller
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- description: clock for PDM BUS
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clock-names:
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items:
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- const: pdm_clk
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- const: pdm_hclk
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dmas:
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maxItems: 1
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dma-names:
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items:
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- const: rx
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power-domains:
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maxItems: 1
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resets:
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items:
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- description: reset for PDM controller
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reset-names:
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items:
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- const: pdm-m
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rockchip,path-map:
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$ref: /schemas/types.yaml#/definitions/uint32-array
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description:
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Defines the mapping of PDM SDIx to PDM PATHx.
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By default, they are mapped one-to-one.
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maxItems: 4
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uniqueItems: true
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items:
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enum: [ 0, 1, 2, 3 ]
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"#sound-dai-cells":
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const: 0
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required:
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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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- "#sound-dai-cells"
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additionalProperties: false
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examples:
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- |
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#include <dt-bindings/clock/rk3328-cru.h>
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#include <dt-bindings/interrupt-controller/arm-gic.h>
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#include <dt-bindings/interrupt-controller/irq.h>
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#include <dt-bindings/pinctrl/rockchip.h>
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bus {
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#address-cells = <2>;
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#size-cells = <2>;
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pdm@ff040000 {
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compatible = "rockchip,pdm";
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reg = <0x0 0xff040000 0x0 0x1000>;
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interrupts = <GIC_SPI 82 IRQ_TYPE_LEVEL_HIGH>;
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clocks = <&cru SCLK_PDM>, <&cru HCLK_PDM>;
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clock-names = "pdm_clk", "pdm_hclk";
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dmas = <&dmac 16>;
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dma-names = "rx";
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#sound-dai-cells = <0>;
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pinctrl-names = "default", "sleep";
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pinctrl-0 = <&pdmm0_clk
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&pdmm0_sdi0
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&pdmm0_sdi1
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&pdmm0_sdi2
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&pdmm0_sdi3>;
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pinctrl-1 = <&pdmm0_clk_sleep
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&pdmm0_sdi0_sleep
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&pdmm0_sdi1_sleep
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&pdmm0_sdi2_sleep
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&pdmm0_sdi3_sleep>;
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};
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};
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