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# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/sound/rockchip,pdm.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: Rockchip PDM controller
description:
The Pulse Density Modulation Interface Controller (PDMC) is
a PDM interface controller and decoder that support PDM format.
It integrates a clock generator driving the PDM microphone
and embeds filters which decimate the incoming bit stream to
obtain most common audio rates.
maintainers:
- Heiko Stuebner <heiko@sntech.de>
properties:
compatible:
enum:
- rockchip,pdm
- rockchip,px30-pdm
- rockchip,rk1808-pdm
- rockchip,rk3308-pdm
- rockchip,rk3568-pdm
- rockchip,rv1126-pdm
reg:
maxItems: 1
interrupts:
maxItems: 1
clocks:
items:
- description: clock for PDM controller
- description: clock for PDM BUS
clock-names:
items:
- const: pdm_clk
- const: pdm_hclk
dmas:
maxItems: 1
dma-names:
items:
- const: rx
power-domains:
maxItems: 1
resets:
items:
- description: reset for PDM controller
reset-names:
items:
- const: pdm-m
rockchip,path-map:
$ref: /schemas/types.yaml#/definitions/uint32-array
description:
Defines the mapping of PDM SDIx to PDM PATHx.
By default, they are mapped one-to-one.
maxItems: 4
uniqueItems: true
items:
enum: [ 0, 1, 2, 3 ]
"#sound-dai-cells":
const: 0
required:
- compatible
- reg
- interrupts
- clocks
- clock-names
- dmas
- dma-names
- "#sound-dai-cells"
additionalProperties: false
examples:
- |
#include <dt-bindings/clock/rk3328-cru.h>
#include <dt-bindings/interrupt-controller/arm-gic.h>
#include <dt-bindings/interrupt-controller/irq.h>
#include <dt-bindings/pinctrl/rockchip.h>
bus {
#address-cells = <2>;
#size-cells = <2>;
pdm@ff040000 {
compatible = "rockchip,pdm";
reg = <0x0 0xff040000 0x0 0x1000>;
interrupts = <GIC_SPI 82 IRQ_TYPE_LEVEL_HIGH>;
clocks = <&cru SCLK_PDM>, <&cru HCLK_PDM>;
clock-names = "pdm_clk", "pdm_hclk";
dmas = <&dmac 16>;
dma-names = "rx";
#sound-dai-cells = <0>;
pinctrl-names = "default", "sleep";
pinctrl-0 = <&pdmm0_clk
&pdmm0_sdi0
&pdmm0_sdi1
&pdmm0_sdi2
&pdmm0_sdi3>;
pinctrl-1 = <&pdmm0_clk_sleep
&pdmm0_sdi0_sleep
&pdmm0_sdi1_sleep
&pdmm0_sdi2_sleep
&pdmm0_sdi3_sleep>;
};
};
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