microchip,pdmc.yaml

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    1 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
    2 %YAML 1.2
    3 ---
    4 $id: http://devicetree.org/schemas/sound/microchip,pdmc.yaml#
    5 $schema: http://devicetree.org/meta-schemas/core.yaml#
    6 
    7 title: Microchip Pulse Density Microphone Controller
    8 
    9 maintainers:
   10   - Codrin Ciubotariu <codrin.ciubotariu@microchip.com>
   11 
   12 description:
   13   The Microchip Pulse Density Microphone Controller (PDMC) interfaces up to 4
   14   digital microphones having Pulse Density Modulated (PDM) outputs.
   15 
   16 properties:
   17   compatible:
   18     const: microchip,sama7g5-pdmc
   19 
   20   reg:
   21     maxItems: 1
   22 
   23   "#sound-dai-cells":
   24     const: 0
   25 
   26   interrupts:
   27     maxItems: 1
   28 
   29   clocks:
   30     items:
   31       - description: Peripheral Bus Clock
   32       - description: Generic Clock
   33 
   34   clock-names:
   35     items:
   36       - const: pclk
   37       - const: gclk
   38 
   39   dmas:
   40     description: RX DMA Channel
   41     maxItems: 1
   42 
   43   dma-names:
   44     const: rx
   45 
   46   microchip,mic-pos:
   47     description: |
   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
   53     items:
   54       items:
   55         - description: value for DS line
   56         - description: value for sampling edge
   57       anyOf:
   58         - enum:
   59             - [0, 0]
   60             - [0, 1]
   61             - [1, 0]
   62             - [1, 1]
   63     minItems: 1
   64     maxItems: 4
   65     uniqueItems: true
   66 
   67 required:
   68   - compatible
   69   - reg
   70   - "#sound-dai-cells"
   71   - interrupts
   72   - clocks
   73   - clock-names
   74   - dmas
   75   - dma-names
   76   - microchip,mic-pos
   77 
   78 additionalProperties: false
   79 
   80 examples:
   81   - |
   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>
   86 
   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)>;
   93         dma-names = "rx";
   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>;
  100     };

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