Kernel-4.18.0-80.el8_spi_atmel

Atmel SPI device

Required properties:

• compatible : should be “atmel,at91rm9200-spi”.
• reg: Address and length of the register set for the device
• interrupts: Should contain spi interrupt
• cs-gpios: chipselects (optional for SPI controller version >= 2 with the
  Chip Select Active After Transfer feature).
• clock-names: tuple listing input clock names.
  Required elements: “spi_clk”
• clocks: phandles to input clocks.

Optional properties:

• atmel,fifo-size: maximum number of data the RX and TX FIFOs can store for FIFO
  capable SPI controllers.

Example:

spi1: spi@fffcc000 {
compatible = “atmel,at91rm9200-spi”;
reg = <0xfffcc000 0x4000>;
interrupts = <13 4 5>;
#address-cells = <1>;
#size-cells = <0>;
clocks = <&spi1_clk>;
clock-names = “spi_clk”;
cs-gpios = <&pioB 3 0>;
atmel,fifo-size = <32>;

mmc-slot@0 {
    compatible = "mmc-spi-slot";
    reg = <0>;
    gpios = <&pioC 4 0>;    /* CD */
    spi-max-frequency = <25000000>;
};

};