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

   1 * Rockchip SPI Controller
   2
   3 The Rockchip SPI controller is used to interface with various devices such as flash
   4 and display controllers using the SPI communication interface.
   5
   6 Required Properties:
   7
   8 - compatible: should be one of the following.
   9     "rockchip,rk3036-spi" for rk3036 SoCS.
  10     "rockchip,rk3066-spi" for rk3066 SoCs.
  11     "rockchip,rk3188-spi" for rk3188 SoCs.
  12     "rockchip,rk3228-spi" for rk3228 SoCS.
  13     "rockchip,rk3288-spi" for rk3288 SoCs.
  14     "rockchip,rk3368-spi" for rk3368 SoCs.
  15     "rockchip,rk3399-spi" for rk3399 SoCs.
  16 - reg: physical base address of the controller and length of memory mapped
  17        region.
  18 - interrupts: The interrupt number to the cpu. The interrupt specifier format
  19               depends on the interrupt controller.
  20 - clocks: Must contain an entry for each entry in clock-names.
  21 - clock-names: Shall be "spiclk" for the transfer-clock, and "apb_pclk" for
  22                            the peripheral clock.
  23 - #address-cells: should be 1.
  24 - #size-cells: should be 0.
  25
  26 Optional Properties:
  27
  28 - dmas: DMA specifiers for tx and rx dma. See the DMA client binding,
  29                 Documentation/devicetree/bindings/dma/dma.txt
  30 - dma-names: DMA request names should include "tx" and "rx" if present.
  31 - rx-sample-delay-ns: nanoseconds to delay after the SCLK edge before sampling
  32                 Rx data (may need to be fine tuned for high capacitance lines).
  33                 No delay (0) by default.
  34 - pinctrl-names: Names for the pin configuration(s); may be "default" or
  35                 "sleep", where the "sleep" configuration may describe the state
  36                 the pins should be in during system suspend. See also
  37                 pinctrl/pinctrl-bindings.txt.
  38
  39
  40 Example:
  41
  42         spi0: spi@ff110000 {
  43                 compatible = "rockchip,rk3066-spi";
  44                 reg = <0xff110000 0x1000>;
  45                 dmas = <&pdma1 11>, <&pdma1 12>;
  46                 dma-names = "tx", "rx";
  47                 rx-sample-delay-ns = <10>;
  48                 #address-cells = <1>;
  49                 #size-cells = <0>;
  50                 interrupts = <GIC_SPI 44 IRQ_TYPE_LEVEL_HIGH>;
  51                 clocks = <&cru SCLK_SPI0>, <&cru PCLK_SPI0>;
  52                 clock-names = "spiclk", "apb_pclk";
  53                 pinctrl-0 = <&spi1_pins>;
  54                 pinctrl-1 = <&spi1_sleep>;
  55                 pinctrl-names = "default", "sleep";
  56         };