rockchip,pdm.yaml

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    1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
    2 %YAML 1.2
    3 ---
    4 $id: http://devicetree.org/schemas/sound/rockchip,pdm.yaml#
    5 $schema: http://devicetree.org/meta-schemas/core.yaml#
    6 
    7 title: Rockchip PDM controller
    8 
    9 description:
   10   The Pulse Density Modulation Interface Controller (PDMC) is
   11   a PDM interface controller and decoder that support PDM format.
   12   It integrates a clock generator driving the PDM microphone
   13   and embeds filters which decimate the incoming bit stream to
   14   obtain most common audio rates.
   15 
   16 maintainers:
   17   - Heiko Stuebner <heiko@sntech.de>
   18 
   19 properties:
   20   compatible:
   21     enum:
   22       - rockchip,pdm
   23       - rockchip,px30-pdm
   24       - rockchip,rk1808-pdm
   25       - rockchip,rk3308-pdm
   26       - rockchip,rk3568-pdm
   27       - rockchip,rv1126-pdm
   28 
   29   reg:
   30     maxItems: 1
   31 
   32   interrupts:
   33     maxItems: 1
   34 
   35   clocks:
   36     items:
   37       - description: clock for PDM controller
   38       - description: clock for PDM BUS
   39 
   40   clock-names:
   41     items:
   42       - const: pdm_clk
   43       - const: pdm_hclk
   44 
   45   dmas:
   46     maxItems: 1
   47 
   48   dma-names:
   49     items:
   50       - const: rx
   51 
   52   power-domains:
   53     maxItems: 1
   54 
   55   resets:
   56     items:
   57       - description: reset for PDM controller
   58 
   59   reset-names:
   60     items:
   61       - const: pdm-m
   62 
   63   rockchip,path-map:
   64     $ref: /schemas/types.yaml#/definitions/uint32-array
   65     description:
   66       Defines the mapping of PDM SDIx to PDM PATHx.
   67       By default, they are mapped one-to-one.
   68     maxItems: 4
   69     uniqueItems: true
   70     items:
   71       enum: [ 0, 1, 2, 3 ]
   72 
   73   "#sound-dai-cells":
   74     const: 0
   75 
   76 required:
   77   - compatible
   78   - reg
   79   - interrupts
   80   - clocks
   81   - clock-names
   82   - dmas
   83   - dma-names
   84   - "#sound-dai-cells"
   85 
   86 additionalProperties: false
   87 
   88 examples:
   89   - |
   90     #include <dt-bindings/clock/rk3328-cru.h>
   91     #include <dt-bindings/interrupt-controller/arm-gic.h>
   92     #include <dt-bindings/interrupt-controller/irq.h>
   93     #include <dt-bindings/pinctrl/rockchip.h>
   94 
   95     bus {
   96         #address-cells = <2>;
   97         #size-cells = <2>;
   98 
   99         pdm@ff040000 {
  100             compatible = "rockchip,pdm";
  101             reg = <0x0 0xff040000 0x0 0x1000>;
  102             interrupts = <GIC_SPI 82 IRQ_TYPE_LEVEL_HIGH>;
  103             clocks = <&cru SCLK_PDM>, <&cru HCLK_PDM>;
  104             clock-names = "pdm_clk", "pdm_hclk";
  105             dmas = <&dmac 16>;
  106             dma-names = "rx";
  107             #sound-dai-cells = <0>;
  108             pinctrl-names = "default", "sleep";
  109             pinctrl-0 = <&pdmm0_clk
  110                          &pdmm0_sdi0
  111                          &pdmm0_sdi1
  112                          &pdmm0_sdi2
  113                          &pdmm0_sdi3>;
  114             pinctrl-1 = <&pdmm0_clk_sleep
  115                          &pdmm0_sdi0_sleep
  116                          &pdmm0_sdi1_sleep
  117                          &pdmm0_sdi2_sleep
  118                          &pdmm0_sdi3_sleep>;
  119         };
  120     };

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sys/contrib/device-tree/Bindings/sound/rockchip,pdm.yaml