# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) %YAML 1.2 --- $id: http://devicetree.org/schemas/sound/microchip,pdmc.yaml# $schema: http://devicetree.org/meta-schemas/core.yaml# title: Microchip Pulse Density Microphone Controller maintainers: - Codrin Ciubotariu <codrin.ciubotariu@microchip.com> description: The Microchip Pulse Density Microphone Controller (PDMC) interfaces up to 4 digital microphones having Pulse Density Modulated (PDM) outputs. allOf: - $ref: dai-common.yaml# properties: compatible: const: microchip,sama7g5-pdmc reg: maxItems: 1 "#sound-dai-cells": const: 0 interrupts: maxItems: 1 clocks: items: - description: Peripheral Bus Clock - description: Generic Clock clock-names: items: - const: pclk - const: gclk dmas: description: RX DMA Channel maxItems: 1 dma-names: const: rx microchip,mic-pos: description: | Position of PDM microphones on the DS line and the sampling edge (rising or falling) of the CLK line. A microphone is represented as a pair of DS line and the sampling edge. The first microphone is mapped to channel 0, the second to channel 1, etc. $ref: /schemas/types.yaml#/definitions/uint32-matrix items: items: - description: value for DS line - description: value for sampling edge anyOf: - enum: - [0, 0] - [0, 1] - [1, 0] - [1, 1] minItems: 1 maxItems: 4 uniqueItems: true required: - compatible - reg - "#sound-dai-cells" - interrupts - clocks - clock-names - dmas - dma-names - microchip,mic-pos unevaluatedProperties: false examples: - | #include <dt-bindings/clock/at91.h> #include <dt-bindings/dma/at91.h> #include <dt-bindings/interrupt-controller/arm-gic.h> #include <dt-bindings/sound/microchip,pdmc.h> pdmc: sound@e1608000 { compatible = "microchip,sama7g5-pdmc"; reg = <0xe1608000 0x4000>; #sound-dai-cells = <0>; interrupts = <GIC_SPI 68 IRQ_TYPE_LEVEL_HIGH>; dmas = <&dma0 AT91_XDMAC_DT_PERID(37)>; dma-names = "rx"; clocks = <&pmc PMC_TYPE_PERIPHERAL 68>, <&pmc PMC_TYPE_GCK 68>; clock-names = "pclk", "gclk"; microchip,mic-pos = <MCHP_PDMC_DS0 MCHP_PDMC_CLK_POSITIVE>, <MCHP_PDMC_DS0 MCHP_PDMC_CLK_NEGATIVE>, <MCHP_PDMC_DS1 MCHP_PDMC_CLK_POSITIVE>, <MCHP_PDMC_DS1 MCHP_PDMC_CLK_NEGATIVE>; };