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    Subject[PATCH v2 1/2] documentation: add rockchip spi documentation
    Date
    Signed-off-by: addy ke <addy.ke@rock-chips.com>
    ---
    changes since v1:
    - fix binding document according to comments from Mark Rutland
    - fix address according to comments from Mark Brown
    - combine all properties into "Required Properties" suggested by Heiko Stübner
    - remove "Board Specific Portion" suggested by Heiko Stübner

    .../devicetree/bindings/spi/spi-rockchip.txt | 37 ++++++++++++++++++++++
    1 file changed, 37 insertions(+)
    create mode 100644 Documentation/devicetree/bindings/spi/spi-rockchip.txt

    diff --git a/Documentation/devicetree/bindings/spi/spi-rockchip.txt b/Documentation/devicetree/bindings/spi/spi-rockchip.txt
    new file mode 100644
    index 0000000..7bab355
    --- /dev/null
    +++ b/Documentation/devicetree/bindings/spi/spi-rockchip.txt
    @@ -0,0 +1,37 @@
    +* Rockchip SPI Controller
    +
    +The Rockchip SPI controller is used to interface with various devices such as flash
    +and display controllers using the SPI communication interface.
    +
    +Required Properties:
    +
    +- compatible: should be one of the following.
    + "rockchip,rk3066-spi" for rk3066.
    + "rockchip,rk3188-spi", "rockchip,rk3066-spi" for rk3188.
    + "rockchip,rk3288-spi", "rockchip,rk3066-spi" for rk3288.
    +- reg: physical base address of the controller and length of memory mapped
    + region.
    +- interrupts: The interrupt number to the cpu. The interrupt specifier format
    + depends on the interrupt controller.
    +- clocks: Must contain an entry for each entry in clock-names.
    +- clock-names: Shall be "spiclk" for the transfer-clock, and "apb_pclk" for
    + the peripheral clock.
    +- dmas: DMA specifiers for tx and rx dma. See the DMA client binding,
    + Documentation/devicetree/bindings/dma/dma.txt
    +- dma-names: DMA request names should include "tx" and "rx" if present.
    +- #address-cells: should be 1.
    +- #size-cells: should be 0.
    +
    +Example:
    +
    + spi0: spi@ff110000 {
    + compatible = "rockchip,rk3066-spi";
    + reg = <0xff110000 0x1000>;
    + dmas = <&pdma1 11>, <&pdma1 12>;
    + dma-names = "tx", "rx";
    + #address-cells = <1>;
    + #size-cells = <0>;
    + interrupts = <GIC_SPI 44 IRQ_TYPE_LEVEL_HIGH>;
    + clocks = <&cru SCLK_SPI0>, <&cru PCLK_SPI0>;
    + clock-names = "spiclk", "apb_pclk";
    + };
    --
    1.8.3.2

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