[deliverable/linux.git] / Documentation / devicetree / bindings / spi / brcm,bcm2835-aux-spi.txt

Broadcom BCM2835 auxiliar SPI1/2 controller

The BCM2835 contains two forms of SPI master controller, one known simply as
SPI0, and the other known as the "Universal SPI Master"; part of the
auxiliary block. This binding applies to the SPI1/2 controller.

Required properties:
- compatible: Should be "brcm,bcm2835-aux-spi".
- reg: Should contain register location and length for the spi block
- interrupts: Should contain shared interrupt of the aux block
- clocks: The clock feeding the SPI controller - needs to
	  point to the auxiliar clock driver of the bcm2835,
	  as this clock will enable the output gate for the specific
	  clock.
- cs-gpios: the cs-gpios (native cs is NOT supported)
	    see also spi-bus.txt

Example:

spi1@7e215080 {
	compatible = "brcm,bcm2835-aux-spi";
	reg = <0x7e215080 0x40>;
	interrupts = <1 29>;
	clocks = <&aux_clocks BCM2835_AUX_CLOCK_SPI1>;
	#address-cells = <1>;
	#size-cells = <0>;
	cs-gpios = <&gpio 18>, <&gpio 17>, <&gpio 16>;
};

spi2@7e2150c0 {
	compatible = "brcm,bcm2835-aux-spi";
	reg = <0x7e2150c0 0x40>;
	interrupts = <1 29>;
	clocks = <&aux_clocks BCM2835_AUX_CLOCK_SPI2>;
	#address-cells = <1>;
	#size-cells = <0>;
	cs-gpios = <&gpio 43>, <&gpio 44>, <&gpio 45>;
};
Commit	Line	Data
541cf5de MS	1	Broadcom BCM2835 auxiliar SPI1/2 controller
	2
	3	The BCM2835 contains two forms of SPI master controller, one known simply as
	4	SPI0, and the other known as the "Universal SPI Master"; part of the
	5	auxiliary block. This binding applies to the SPI1/2 controller.
	6
	7	Required properties:
	8	- compatible: Should be "brcm,bcm2835-aux-spi".
	9	- reg: Should contain register location and length for the spi block
	10	- interrupts: Should contain shared interrupt of the aux block
	11	- clocks: The clock feeding the SPI controller - needs to
	12	point to the auxiliar clock driver of the bcm2835,
	13	as this clock will enable the output gate for the specific
	14	clock.
	15	- cs-gpios: the cs-gpios (native cs is NOT supported)
	16	see also spi-bus.txt
	17
	18	Example:
	19
	20	spi1@7e215080 {
	21	compatible = "brcm,bcm2835-aux-spi";
	22	reg = <0x7e215080 0x40>;
	23	interrupts = <1 29>;
	24	clocks = <&aux_clocks BCM2835_AUX_CLOCK_SPI1>;
	25	#address-cells = <1>;
	26	#size-cells = <0>;
	27	cs-gpios = <&gpio 18>, <&gpio 17>, <&gpio 16>;
	28	};
	29
	30	spi2@7e2150c0 {
	31	compatible = "brcm,bcm2835-aux-spi";
	32	reg = <0x7e2150c0 0x40>;
	33	interrupts = <1 29>;
	34	clocks = <&aux_clocks BCM2835_AUX_CLOCK_SPI2>;
	35	#address-cells = <1>;
	36	#size-cells = <0>;
	37	cs-gpios = <&gpio 43>, <&gpio 44>, <&gpio 45>;
	38	};