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

   1 * Atmel ClassD driver under ALSA SoC architecture
   2
   3 Required properties:
   4 - compatible
   5         Should be "atmel,sama5d2-classd".
   6 - reg
   7         Should contain ClassD registers location and length.
   8 - interrupts
   9         Should contain the IRQ line for the ClassD.
  10 - dmas
  11         One DMA specifiers as described in atmel-dma.txt and dma.txt files.
  12 - dma-names
  13         Must be "tx".
  14 - clock-names
  15         Tuple listing input clock names.
  16         Required elements: "pclk" and "gclk".
  17 - clocks
  18         Please refer to clock-bindings.txt.
  19 - assigned-clocks
  20         Should be <&classd_gclk>.
  21
  22 Optional properties:
  23 - pinctrl-names, pinctrl-0
  24         Please refer to pinctrl-bindings.txt.
  25 - atmel,model
  26         The user-visible name of this sound complex.
  27         The default value is "CLASSD".
  28 - atmel,pwm-type
  29         PWM modulation type, "single" or "diff".
  30         The default value is "single".
  31 - atmel,non-overlap-time
  32         Set non-overlapping time, the unit is nanosecond(ns).
  33         There are four values,
  34         <5>, <10>, <15>, <20>, the default value is <10>.
  35         Non-overlapping will be disabled if not specified.
  36
  37 Example:
  38 classd: classd@fc048000 {
  39                 compatible = "atmel,sama5d2-classd";
  40                 reg = <0xfc048000 0x100>;
  41                 interrupts = <59 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(47))>;
  45                 dma-names = "tx";
  46                 clocks = <&classd_clk>, <&classd_gclk>;
  47                 clock-names = "pclk", "gclk";
  48                 assigned-clocks = <&classd_gclk>;
  49
  50                 pinctrl-names = "default";
  51                 pinctrl-0 = <&pinctrl_classd_default>;
  52                 atmel,model = "classd @ SAMA5D2-Xplained";
  53                 atmel,pwm-type = "diff";
  54                 atmel,non-overlap-time = <10>;
  55 };