davinci-mcbsp.txt

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    1 Texas Instruments DaVinci McBSP module
    2 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    3 
    4 This binding describes the "Multi-channel Buffered Serial Port" (McBSP)
    5 audio interface found in some TI DaVinci processors like the OMAP-L138 or AM180x.
    6 
    7 
    8 Required properties:
    9 ~~~~~~~~~~~~~~~~~~~~
   10 - compatible :
   11         "ti,da850-mcbsp" : for DA850, AM180x and OPAM-L138 platforms
   12 
   13 - reg : physical base address and length of the controller memory mapped
   14         region(s).
   15 - reg-names : Should contain:
   16         * "mpu" for the main registers (required).
   17         * "dat" for the data FIFO (optional).
   18 
   19 - dmas: three element list of DMA controller phandles, DMA request line and
   20         TC channel ordered triplets.
   21 - dma-names: identifier string for each DMA request line in the dmas property.
   22         These strings correspond 1:1 with the ordered pairs in dmas. The dma
   23         identifiers must be "rx" and "tx".
   24 
   25 Optional properties:
   26 ~~~~~~~~~~~~~~~~~~~~
   27 - interrupts : Interrupt numbers for McBSP
   28 - interrupt-names : Known interrupt names are "rx" and "tx"
   29 
   30 - pinctrl-0: Should specify pin control group used for this controller.
   31 - pinctrl-names: Should contain only one value - "default", for more details
   32         please refer to pinctrl-bindings.txt
   33 
   34 Example (AM1808):
   35 ~~~~~~~~~~~~~~~~~
   36 
   37 mcbsp0: mcbsp@1d10000 {
   38         compatible = "ti,da850-mcbsp";
   39         pinctrl-names = "default";
   40         pinctrl-0 = <&mcbsp0_pins>;
   41 
   42         reg =   <0x00110000 0x1000>,
   43                 <0x00310000 0x1000>;
   44         reg-names = "mpu", "dat";
   45         interrupts = <97 98>;
   46         interrupt-names = "rx", "tx";
   47         dmas = <&edma0 3 1
   48                 &edma0 2 1>;
   49         dma-names = "tx", "rx";
   50 };

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