Documentation/devicetree/bindings/spi/fsl-imx-cspi.txt

   1 * Freescale (Enhanced) Configurable Serial Peripheral Interface
   2   (CSPI/eCSPI) for i.MX
   3
   4 Required properties:
   5 - compatible :
   6   - "fsl,imx1-cspi" for SPI compatible with the one integrated on i.MX1
   7   - "fsl,imx21-cspi" for SPI compatible with the one integrated on i.MX21
   8   - "fsl,imx27-cspi" for SPI compatible with the one integrated on i.MX27
   9   - "fsl,imx31-cspi" for SPI compatible with the one integrated on i.MX31
  10   - "fsl,imx35-cspi" for SPI compatible with the one integrated on i.MX35
  11   - "fsl,imx51-ecspi" for SPI compatible with the one integrated on i.MX51
  12   - "fsl,imx53-ecspi" for SPI compatible with the one integrated on i.MX53 and later Soc
  13 - reg : Offset and length of the register set for the device
  14 - interrupts : Should contain CSPI/eCSPI interrupt
  15 - cs-gpios : Specifies the gpio pins to be used for chipselects.
  16 - clocks : Clock specifiers for both ipg and per clocks.
  17 - clock-names : Clock names should include both "ipg" and "per"
  18 See the clock consumer binding,
  19         Documentation/devicetree/bindings/clock/clock-bindings.txt
  20 - dmas: DMA specifiers for tx and rx dma. See the DMA client binding,
  21                 Documentation/devicetree/bindings/dma/dma.txt
  22 - dma-names: DMA request names should include "tx" and "rx" if present.
  23
  24 Obsolete properties:
  25 - fsl,spi-num-chipselects : Contains the number of the chipselect
  26
  27 Optional properties:
  28 - fsl,spi-rdy-drctl: Integer, representing the value of DRCTL, the register
  29 controlling the SPI_READY handling. Note that to enable the DRCTL consideration,
  30 the SPI_READY mode-flag needs to be set too.
  31 Valid values are: 0 (disabled), 1 (edge-triggered burst) and 2 (level-triggered burst).
  32
  33 Example:
  34
  35 ecspi@70010000 {
  36         #address-cells = <1>;
  37         #size-cells = <0>;
  38         compatible = "fsl,imx51-ecspi";
  39         reg = <0x70010000 0x4000>;
  40         interrupts = <36>;
  41         cs-gpios = <&gpio3 24 0>, /* GPIO3_24 */
  42                    <&gpio3 25 0>; /* GPIO3_25 */
  43         dmas = <&sdma 3 7 1>, <&sdma 4 7 2>;
  44         dma-names = "rx", "tx";
  45         fsl,spi-rdy-drctl = <1>;
  46 };