spi: axi: Add bindings documentation for Analog Devices axi-spi-engine (2ec3b628) · Commits · 戴 / test

Add the devicetree bindings documentation for the Analog Devices axi-spi-engine SPI master peripheral. This is a soft-peripheral used in FPGAs. The external interfaces of the peripheral are: * A memory mapped register map which is used to configure the peripheral. * One interrupt. * Two clocks, one for the memory mapped register interface and one for the SPI bus. * A SPI master interface to which the slave devices are connected. These interfaces are described by the devicetree bindings accordingly. Signed-off-by:

Lars-Peter Clausen <lars@metafoo.de> Signed-off-by:

Mark Brown <broonie@kernel.org>

Documentation/devicetree/bindings/spi/adi,axi-spi-engine.txt

0 → 100644

+31 −0

Original line number	Diff line number	Diff line
		Analog Devices AXI SPI Engine controller Device Tree Bindings

		Required properties:
		- compatible : Must be "adi,axi-spi-engine-1.00.a""
		- reg : Physical base address and size of the register map.
		- interrupts : Property with a value describing the interrupt
		number.
		- clock-names : List of input clock names - "s_axi_aclk", "spi_clk"
		- clocks : Clock phandles and specifiers (See clock bindings for
		details on clock-names and clocks).
		- #address-cells : Must be <1>
		- #size-cells : Must be <0>

		Optional subnodes:
		Subnodes are use to represent the SPI slave devices connected to the SPI
		master. They follow the generic SPI bindings as outlined in spi-bus.txt.

		Example:

		spi@@44a00000 {
		compatible = "adi,axi-spi-engine-1.00.a";
		reg = <0x44a00000 0x1000>;
		interrupts = <0 56 4>;
		clocks = <&clkc 15 &clkc 15>;
		clock-names = "s_axi_aclk", "spi_clk";

		#address-cells = <1>;
		#size-cells = <0>;

		/* SPI devices */
		};

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