xref: /linux/Documentation/devicetree/bindings/spi/microchip,spi-pic32.txt (revision e5c86679d5e864947a52fb31e45a425dea3e7fa9) 
1Microchip PIC32 SPI Master controller
2
3Required properties:
4- compatible: Should be "microchip,pic32mzda-spi".
5- reg: Address and length of register space for the device.
6- interrupts: Should contain all three spi interrupts in sequence
7              of <fault-irq>, <receive-irq>, <transmit-irq>.
8- interrupt-names: Should be "fault", "rx", "tx" in order.
9- clocks: Phandle of the clock generating SPI clock on the bus.
10- clock-names: Should be "mck0".
11- cs-gpios: Specifies the gpio pins to be used for chipselects.
12            See: Documentation/devicetree/bindings/spi/spi-bus.txt
13
14Optional properties:
15- dmas: Two or more DMA channel specifiers following the convention outlined
16        in Documentation/devicetree/bindings/dma/dma.txt
17- dma-names: Names for the dma channels. There must be at least one channel
18             named "spi-tx" for transmit and named "spi-rx" for receive.
19
20Example:
21
22spi1: spi@1f821000 {
23        compatible = "microchip,pic32mzda-spi";
24        reg = <0x1f821000 0x200>;
25        interrupts = <109 IRQ_TYPE_LEVEL_HIGH>,
26                     <110 IRQ_TYPE_LEVEL_HIGH>,
27                     <111 IRQ_TYPE_LEVEL_HIGH>;
28        interrupt-names = "fault", "rx", "tx";
29        clocks = <&PBCLK2>;
30        clock-names = "mck0";
31        cs-gpios = <&gpio3 4 GPIO_ACTIVE_LOW>;
32        dmas = <&dma 134>, <&dma 135>;
33        dma-names = "spi-rx", "spi-tx";
34};
35