Kernel-4.18.0-80.el8_spi-sirf

• CSR SiRFprimaII Serial Peripheral Interface

Required properties:

• compatible : Should be “sirf,prima2-spi”, “sirf,prima2-usp”

           or "sirf,atlas7-usp"
  

• reg : Offset and length of the register set for the device

• interrupts : Should contain SPI interrupt

• resets: phandle to the reset controller asserting this device in

      reset
  

  See ../reset/reset.txt for details.

• dmas : Must contain an entry for each entry in clock-names.
  See ../dma/dma.txt for details.

• dma-names : Must include the following entries:

  • rx
  • tx

• clocks : Must contain an entry for each entry in clock-names.
  See ../clocks/clock-bindings.txt for details.

• #address-cells: Number of cells required to define a chip select

              address on the SPI bus. Should be set to 1.
  

• #size-cells: Should be zero.

Optional properties:

• spi-max-frequency: Specifies maximum SPI clock frequency,

                 Units - Hz. Definition as per
                 Documentation/devicetree/bindings/spi/spi-bus.txt
  

• cs-gpios: should specify GPIOs used for chipselects.

Example:

spi0: spi@b00d0000 {
compatible = “sirf,prima2-spi”;
reg = <0xb00d0000 0x10000>;
interrupts = <15>;
dmas = <&dmac1 9>,
<&dmac1 4>;
dma-names = “rx”, “tx”;
#address-cells = <1>;
#size-cells = <0>;
clocks = <&clks 19>;
resets = <&rstc 26>;
};