121 lines
2.7 KiB
YAML
121 lines
2.7 KiB
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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