Kernel-4.18.0-80.el8_spi-rockchip

• Rockchip SPI Controller

The Rockchip SPI controller is used to interface with various devices such as flash
and display controllers using the SPI communication interface.

Required Properties:

• compatible: should be one of the following.
  “rockchip,rv1108-spi” for rv1108 SoCs.
  “rockchip,rk3036-spi” for rk3036 SoCS.
  “rockchip,rk3066-spi” for rk3066 SoCs.
  “rockchip,rk3188-spi” for rk3188 SoCs.
  “rockchip,rk3228-spi” for rk3228 SoCS.
  “rockchip,rk3288-spi” for rk3288 SoCs.
  “rockchip,rk3368-spi” for rk3368 SoCs.
  “rockchip,rk3399-spi” for rk3399 SoCs.
• reg: physical base address of the controller and length of memory mapped

   region.
  

• interrupts: The interrupt number to the cpu. The interrupt specifier format

          depends on the interrupt controller.
  

• clocks: Must contain an entry for each entry in clock-names.
• clock-names: Shall be “spiclk” for the transfer-clock, and “apb_pclk” for

           the peripheral clock.
  

• #address-cells: should be 1.
• #size-cells: should be 0.

Optional Properties:

• dmas: DMA specifiers for tx and rx dma. See the DMA client binding,

    Documentation/devicetree/bindings/dma/dma.txt
  

• dma-names: DMA request names should include “tx” and “rx” if present.
• rx-sample-delay-ns: nanoseconds to delay after the SCLK edge before sampling

    Rx data (may need to be fine tuned for high capacitance lines).
    No delay (0) by default.
  

• pinctrl-names: Names for the pin configuration(s); may be “default” or

    "sleep", where the "sleep" configuration may describe the state
    the pins should be in during system suspend. See also
    pinctrl/pinctrl-bindings.txt.
  

Example:

spi0: spi@ff110000 {
    compatible = "rockchip,rk3066-spi";
    reg = <0xff110000 0x1000>;
    dmas = <&pdma1 11>, <&pdma1 12>;
    dma-names = "tx", "rx";
    rx-sample-delay-ns = <10>;
    #address-cells = <1>;
    #size-cells = <0>;
    interrupts = <GIC_SPI 44 IRQ_TYPE_LEVEL_HIGH>;
    clocks = <&cru SCLK_SPI0>, <&cru PCLK_SPI0>;
    clock-names = "spiclk", "apb_pclk";
    pinctrl-0 = <&spi1_pins>;
    pinctrl-1 = <&spi1_sleep>;
    pinctrl-names = "default", "sleep";
};