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

   1 OMAP2+ McSPI device
   2
   3 Required properties:
   4 - compatible :
   5   - "ti,am654-mcspi" for AM654.
   6   - "ti,omap2-mcspi" for OMAP2 & OMAP3.
   7   - "ti,omap4-mcspi" for OMAP4+.
   8 - ti,spi-num-cs : Number of chipselect supported  by the instance.
   9 - ti,hwmods: Name of the hwmod associated to the McSPI
  10 - ti,pindir-d0-out-d1-in: Select the D0 pin as output and D1 as
  11                           input. The default is D0 as input and
  12                           D1 as output.
  13
  14 Optional properties:
  15 - dmas: List of DMA specifiers with the controller specific format
  16         as described in the generic DMA client binding. A tx and rx
  17         specifier is required for each chip select.
  18 - dma-names: List of DMA request names. These strings correspond
  19         1:1 with the DMA specifiers listed in dmas. The string naming
  20         is to be "rxN" and "txN" for RX and TX requests,
  21         respectively, where N equals the chip select number.
  22
  23 Examples:
  24
  25 [hwmod populated DMA resources]
  26
  27 mcspi1: mcspi@1 {
  28     #address-cells = <1>;
  29     #size-cells = <0>;
  30     compatible = "ti,omap4-mcspi";
  31     ti,hwmods = "mcspi1";
  32     ti,spi-num-cs = <4>;
  33 };
  34
  35 [generic DMA request binding]
  36
  37 mcspi1: mcspi@1 {
  38     #address-cells = <1>;
  39     #size-cells = <0>;
  40     compatible = "ti,omap4-mcspi";
  41     ti,hwmods = "mcspi1";
  42     ti,spi-num-cs = <2>;
  43     dmas = <&edma 42
  44             &edma 43
  45             &edma 44
  46             &edma 45>;
  47     dma-names = "tx0", "rx0", "tx1", "rx1";
  48 };