Documentation/devicetree/bindings/sound/atmel-pdmic.txt

   1 * Atmel PDMIC driver under ALSA SoC architecture
   2
   3 Required properties:
   4 - compatible
   5         Should be "atmel,sama5d2-pdmic".
   6 - reg
   7         Should contain PDMIC registers location and length.
   8 - interrupts
   9         Should contain the IRQ line for the PDMIC.
  10 - dmas
  11         One DMA specifiers as described in atmel-dma.txt and dma.txt files.
  12 - dma-names
  13         Must be "rx".
  14 - clock-names
  15         Required elements:
  16         - "pclk"        peripheral clock
  17         - "gclk"        generated clock
  18 - clocks
  19         Must contain an entry for each required entry in clock-names.
  20         Please refer to clock-bindings.txt.
  21 - atmel,mic-min-freq
  22         The minimal frequency that the micphone supports.
  23 - atmel,mic-max-freq
  24         The maximal frequency that the micphone supports.
  25
  26 Optional properties:
  27 - pinctrl-names, pinctrl-0
  28         Please refer to pinctrl-bindings.txt.
  29 - atmel,model
  30         The user-visible name of this sound card.
  31         The default value is "PDMIC".
  32 - atmel,mic-offset
  33         The offset that should be added.
  34         The range is from -32768 to 32767.
  35         The default value is 0.
  36
  37 Example:
  38         pdmic@f8018000 {
  39                                 compatible = "atmel,sama5d2-pdmic";
  40                                 reg = <0xf8018000 0x124>;
  41                                 interrupts = <48 IRQ_TYPE_LEVEL_HIGH 7>;
  42                                 dmas = <&dma0
  43                                         (AT91_XDMAC_DT_MEM_IF(0) | AT91_XDMAC_DT_PER_IF(1)
  44                                         | AT91_XDMAC_DT_PERID(50))>;
  45                                 dma-names = "rx";
  46                                 clocks = <&pdmic_clk>, <&pdmic_gclk>;
  47                                 clock-names = "pclk", "gclk";
  48
  49                                 pinctrl-names = "default";
  50                                 pinctrl-0 = <&pinctrl_pdmic_default>;
  51                                 atmel,model = "PDMIC @ sama5d2_xplained";
  52                                 atmel,mic-min-freq = <1000000>;
  53                                 atmel,mic-max-freq = <3246000>;
  54                                 atmel,mic-offset = <0x0>;
  55         };