Documentation/devicetree/bindings/sound/davinci-mcasp-audio.txt

   1 Texas Instruments McASP controller
   2
   3 Required properties:
   4 - compatible :
   5         "ti,dm646x-mcasp-audio" : for DM646x platforms
   6         "ti,da830-mcasp-audio"  : for both DA830 & DA850 platforms
   7         "ti,am33xx-mcasp-audio" : for AM33xx platforms (AM33xx, AM43xx, TI81xx)
   8         "ti,dra7-mcasp-audio"   : for DRA7xx platforms
   9
  10 - reg : Should contain reg specifiers for the entries in the reg-names property.
  11 - reg-names : Should contain:
  12          * "mpu" for the main registers (required). For compatibility with
  13            existing software, it is recommended this is the first entry.
  14          * "dat" for separate data port register access (optional).
  15 - op-mode : I2S/DIT ops mode. 0 for I2S mode. 1 for DIT mode used for S/PDIF,
  16             IEC60958-1, and AES-3 formats.
  17 - tdm-slots : Slots for TDM operation. Indicates number of channels transmitted
  18               or received over one serializer.
  19 - serial-dir : A list of serializer configuration. Each entry is a number
  20                indication for serializer pin direction.
  21                (0 - INACTIVE, 1 - TX, 2 - RX)
  22 - dmas: two element list of DMA controller phandles and DMA request line
  23         ordered pairs.
  24 - dma-names: identifier string for each DMA request line in the dmas property.
  25              These strings correspond 1:1 with the ordered pairs in dmas. The dma
  26              identifiers must be "rx" and "tx".
  27
  28 Optional properties:
  29
  30 - ti,hwmods : Must be "mcasp<n>", n is controller instance starting 0
  31 - tx-num-evt : FIFO levels.
  32 - rx-num-evt : FIFO levels.
  33 - sram-size-playback : size of sram to be allocated during playback
  34 - sram-size-capture  : size of sram to be allocated during capture
  35 - interrupts : Interrupt numbers for McASP
  36 - interrupt-names : Known interrupt names are "tx" and "rx"
  37 - pinctrl-0: Should specify pin control group used for this controller.
  38 - pinctrl-names: Should contain only one value - "default", for more details
  39                  please refer to pinctrl-bindings.txt
  40 - fck_parent : Should contain a valid clock name which will be used as parent
  41                for the McASP fck
  42
  43 Example:
  44
  45 mcasp0: mcasp0@1d00000 {
  46         compatible = "ti,da830-mcasp-audio";
  47         reg = <0x100000 0x3000>;
  48         reg-names "mpu";
  49         interrupts = <82>, <83>;
  50         interrupt-names = "tx", "rx";
  51         op-mode = <0>;          /* MCASP_IIS_MODE */
  52         tdm-slots = <2>;
  53         serial-dir = <
  54                         0 0 0 0 /* 0: INACTIVE, 1: TX, 2: RX */
  55                         0 0 0 0
  56                         0 0 0 1
  57                         2 0 0 0 >;
  58         tx-num-evt = <1>;
  59         rx-num-evt = <1>;
  60 };