Documentation/devicetree/bindings/spi/omap-spi.txt

   1 OMAP2+ McSPI device
   2
   3 Required properties:
   4 - compatible :
   5   - "ti,omap2-mcspi" for OMAP2 & OMAP3.
   6   - "ti,omap4-mcspi" for OMAP4+.
   7 - ti,spi-num-cs : Number of chipselect supported  by the instance.
   8 - ti,hwmods: Name of the hwmod associated to the McSPI
   9 - ti,pindir-d0-out-d1-in: Select the D0 pin as output and D1 as
  10                           input. The default is D0 as input and
  11                           D1 as output.
  12
  13 Optional properties:
  14 - dmas: List of DMA specifiers with the controller specific format
  15         as described in the generic DMA client binding. A tx and rx
  16         specifier is required for each chip select.
  17 - dma-names: List of DMA request names. These strings correspond
  18         1:1 with the DMA specifiers listed in dmas. The string naming
  19         is to be "rxN" and "txN" for RX and TX requests,
  20         respectively, where N equals the chip select number.
  21
  22 Examples:
  23
  24 [hwmod populated DMA resources]
  25
  26 mcspi1: mcspi@1 {
  27     #address-cells = <1>;
  28     #size-cells = <0>;
  29     compatible = "ti,omap4-mcspi";
  30     ti,hwmods = "mcspi1";
  31     ti,spi-num-cs = <4>;
  32 };
  33
  34 [generic DMA request binding]
  35
  36 mcspi1: mcspi@1 {
  37     #address-cells = <1>;
  38     #size-cells = <0>;
  39     compatible = "ti,omap4-mcspi";
  40     ti,hwmods = "mcspi1";
  41     ti,spi-num-cs = <2>;
  42     dmas = <&edma 42
  43             &edma 43
  44             &edma 44
  45             &edma 45>;
  46     dma-names = "tx0", "rx0", "tx1", "rx1";
  47 };