Kernel-4.18.0-80.el8_microchip,spi-pic32

Microchip PIC32 SPI Master controller

Required properties:

• compatible: Should be “microchip,pic32mzda-spi”.
• reg: Address and length of register space for the device.
• interrupts: Should contain all three spi interrupts in sequence

          of <fault-irq>, <receive-irq>, <transmit-irq>.
  

• interrupt-names: Should be “fault”, “rx”, “tx” in order.
• clocks: Phandle of the clock generating SPI clock on the bus.
• clock-names: Should be “mck0”.
• cs-gpios: Specifies the gpio pins to be used for chipselects.

        See: Documentation/devicetree/bindings/spi/spi-bus.txt
  

Optional properties:

• dmas: Two or more DMA channel specifiers following the convention outlined

    in Documentation/devicetree/bindings/dma/dma.txt
  

• dma-names: Names for the dma channels. There must be at least one channel

         named "spi-tx" for transmit and named "spi-rx" for receive.
  

Example:

spi1: spi@1f821000 {
compatible = “microchip,pic32mzda-spi”;
reg = <0x1f821000 0x200>;
interrupts = <109 IRQ_TYPE_LEVEL_HIGH>,
<110 IRQ_TYPE_LEVEL_HIGH>,
<111 IRQ_TYPE_LEVEL_HIGH>;
interrupt-names = “fault”, “rx”, “tx”;
clocks = <&PBCLK2>;
clock-names = “mck0”;
cs-gpios = <&gpio3 4 GPIO_ACTIVE_LOW>;
dmas = <&dma 134>, <&dma 135>;
dma-names = “spi-rx”, “spi-tx”;
};