Kernel-4.18.0-80.el8_davinci-mcasp-audio

Texas Instruments McASP controller

Required properties:

• compatible :
  “ti,dm646x-mcasp-audio” : for DM646x platforms
  “ti,da830-mcasp-audio” : for both DA830 & DA850 platforms
  “ti,am33xx-mcasp-audio” : for AM33xx platforms (AM33xx, AM43xx, TI81xx)
  “ti,dra7-mcasp-audio” : for DRA7xx platforms

• reg : Should contain reg specifiers for the entries in the reg-names property.

• reg-names : Should contain:

     * "mpu" for the main registers (required). For compatibility with
       existing software, it is recommended this is the first entry.
     * "dat" for separate data port register access (optional).
  

• op-mode : I2S/DIT ops mode. 0 for I2S mode. 1 for DIT mode used for S/PDIF,

      IEC60958-1, and AES-3 formats.
  

• tdm-slots : Slots for TDM operation. Indicates number of channels transmitted

        or received over one serializer.
  

• serial-dir : A list of serializer configuration. Each entry is a number

           indication for serializer pin direction.
           (0 - INACTIVE, 1 - TX, 2 - RX)
  

• dmas: two element list of DMA controller phandles and DMA request line

    ordered pairs.
  

• dma-names: identifier string for each DMA request line in the dmas property.

     These strings correspond 1:1 with the ordered pairs in dmas. The dma
     identifiers must be "rx" and "tx".
  

Optional properties:

• ti,hwmods : Must be “mcasp“, n is controller instance starting 0
• tx-num-evt : FIFO levels.
• rx-num-evt : FIFO levels.
• sram-size-playback : size of sram to be allocated during playback
• sram-size-capture : size of sram to be allocated during capture
• interrupts : Interrupt numbers for McASP
• interrupt-names : Known interrupt names are “tx” and “rx”
• pinctrl-0: Should specify pin control group used for this controller.
• pinctrl-names: Should contain only one value - “default”, for more details

       please refer to pinctrl-bindings.txt
  

• fck_parent : Should contain a valid clock name which will be used as parent

       for the McASP fck
  

Example:

mcasp0: mcasp0@1d00000 {
compatible = “ti,da830-mcasp-audio”;
reg = <0x100000 0x3000>;
reg-names “mpu”;
interrupts = <82>, <83>;
interrupt-names = “tx”, “rx”;
op-mode = <0>; /* MCASP_IIS_MODE */
tdm-slots = <2>;
serial-dir = <
0 0 0 0 /* 0: INACTIVE, 1: TX, 2: RX */
0 0 0 0
0 0 0 1
2 0 0 0 >;
tx-num-evt = <1>;
rx-num-evt = <1>;
};