1 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
4 $id: http://devicetree.org/schemas/sound/microchip,sama7g5-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.
17 - $ref: dai-common.yaml#
21 const: microchip,sama7g5-pdmc
34 - description: Peripheral Bus Clock
35 - description: Generic Clock
43 description: RX DMA Channel
51 Position of PDM microphones on the DS line and the sampling edge (rising
52 or falling) of the CLK line. A microphone is represented as a pair of DS
53 line and the sampling edge. The first microphone is mapped to channel 0,
54 the second to channel 1, etc.
55 $ref: /schemas/types.yaml#/definitions/uint32-matrix
58 - description: value for DS line
60 - description: value for sampling edge
66 microchip,startup-delay-us:
68 Specifies the delay in microseconds that needs to be applied after
69 enabling the PDMC microphones to avoid unwanted noise due to microphones
83 unevaluatedProperties: false
87 #include <dt-bindings/clock/at91.h>
88 #include <dt-bindings/dma/at91.h>
89 #include <dt-bindings/interrupt-controller/arm-gic.h>
90 #include <dt-bindings/sound/microchip,pdmc.h>
92 pdmc: sound@e1608000 {
93 compatible = "microchip,sama7g5-pdmc";
94 reg = <0xe1608000 0x4000>;
95 #sound-dai-cells = <0>;
96 interrupts = <GIC_SPI 68 IRQ_TYPE_LEVEL_HIGH>;
97 dmas = <&dma0 AT91_XDMAC_DT_PERID(37)>;
99 clocks = <&pmc PMC_TYPE_PERIPHERAL 68>, <&pmc PMC_TYPE_GCK 68>;
100 clock-names = "pclk", "gclk";
101 microchip,mic-pos = <MCHP_PDMC_DS0 MCHP_PDMC_CLK_POSITIVE>,
102 <MCHP_PDMC_DS0 MCHP_PDMC_CLK_NEGATIVE>,
103 <MCHP_PDMC_DS1 MCHP_PDMC_CLK_POSITIVE>,
104 <MCHP_PDMC_DS1 MCHP_PDMC_CLK_NEGATIVE>;