1 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
4 $id: http://devicetree.org/schemas/sound/microchip,pdmc.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: Microchip Pulse Density Microphone Controller
10 - Codrin Ciubotariu <codrin.ciubotariu@microchip.com>
13 The Microchip Pulse Density Microphone Controller (PDMC) interfaces up to 4
14 digital microphones having Pulse Density Modulated (PDM) outputs.
18 const: microchip,sama7g5-pdmc
31 - description: Peripheral Bus Clock
32 - description: Generic Clock
40 description: RX DMA Channel
48 Position of PDM microphones on the DS line and the sampling edge (rising
49 or falling) of the CLK line. A microphone is represented as a pair of DS
50 line and the sampling edge. The first microphone is mapped to channel 0,
51 the second to channel 1, etc.
52 $ref: /schemas/types.yaml#/definitions/uint32-matrix
55 - description: value for DS line
56 - description: value for sampling edge
78 additionalProperties: false
82 #include <dt-bindings/clock/at91.h>
83 #include <dt-bindings/dma/at91.h>
84 #include <dt-bindings/interrupt-controller/arm-gic.h>
85 #include <dt-bindings/sound/microchip,pdmc.h>
87 pdmc: sound@e1608000 {
88 compatible = "microchip,sama7g5-pdmc";
89 reg = <0xe1608000 0x4000>;
90 #sound-dai-cells = <0>;
91 interrupts = <GIC_SPI 68 IRQ_TYPE_LEVEL_HIGH>;
92 dmas = <&dma0 AT91_XDMAC_DT_PERID(37)>;
94 clocks = <&pmc PMC_TYPE_PERIPHERAL 68>, <&pmc PMC_TYPE_GCK 68>;
95 clock-names = "pclk", "gclk";
96 microchip,mic-pos = <MCHP_PDMC_DS0 MCHP_PDMC_CLK_POSITIVE>,
97 <MCHP_PDMC_DS0 MCHP_PDMC_CLK_NEGATIVE>,
98 <MCHP_PDMC_DS1 MCHP_PDMC_CLK_POSITIVE>,
99 <MCHP_PDMC_DS1 MCHP_PDMC_CLK_NEGATIVE>;