On Thu, Feb 04, 2016 at 05:13:29PM +0100, Lars-Peter Clausen wrote:
> 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@xxxxxxxxxx>
> ---
> .../devicetree/bindings/spi/adi,axi-spi-engine.txt | 31 ++++++++++++++++++++++
> 1 file changed, 31 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/spi/adi,axi-spi-engine.txt
Acked-by: Rob Herring <robh@xxxxxxxxxx>
>
> diff --git a/Documentation/devicetree/bindings/spi/adi,axi-spi-engine.txt b/Documentation/devicetree/bindings/spi/adi,axi-spi-engine.txt
> new file mode 100644
> index 0000000..8a18d71
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/spi/adi,axi-spi-engine.txt
> @@ -0,0 +1,31 @@
> +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 */
> + };
> --
> 2.1.4
>
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