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", "gclk" and "aclk".
  17 - clocks
  18         Please refer to clock-bindings.txt.
  19 - assigned-clocks
  20         Should be <&classd_gclk>.
  21 - assigned-clock-parents
  22         Should be <&audio_pll_pmc>.
  23
  24 Optional properties:
  25 - pinctrl-names, pinctrl-0
  26         Please refer to pinctrl-bindings.txt.
  27 - atmel,model
  28         The user-visible name of this sound complex.
  29         The default value is "CLASSD".
  30 - atmel,pwm-type
  31         PWM modulation type, "single" or "diff".
  32         The default value is "single".
  33 - atmel,non-overlap-time
  34         Set non-overlapping time, the unit is nanosecond(ns).
  35         There are four values,
  36         <5>, <10>, <15>, <20>, the default value is <10>.
  37         Non-overlapping will be disabled if not specified.
  38
  39 Example:
  40 classd: classd@fc048000 {
  41                 compatible = "atmel,sama5d2-classd";
  42                 reg = <0xfc048000 0x100>;
  43                 interrupts = <59 IRQ_TYPE_LEVEL_HIGH 7>;
  44                 dmas = <&dma0
  45                         (AT91_XDMAC_DT_MEM_IF(0) | AT91_XDMAC_DT_PER_IF(1)
  46                         | AT91_XDMAC_DT_PERID(47))>;
  47                 dma-names = "tx";
  48                 clocks = <&classd_clk>, <&classd_gclk>, <&audio_pll_pmc>;
  49                 clock-names = "pclk", "gclk", "aclk";
  50                 assigned-clocks = <&classd_gclk>;
  51                 assigned-clock-parents = <&audio_pll_pmc>;
  52
  53                 pinctrl-names = "default";
  54                 pinctrl-0 = <&pinctrl_classd_default>;
  55                 atmel,model = "classd @ SAMA5D2-Xplained";
  56                 atmel,pwm-type = "diff";
  57                 atmel,non-overlap-time = <10>;
  58 };