Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / Documentation / devicetree / bindings / spi / snps,dw-apb-ssi.txt

diff --git a/kernel/Documentation/devicetree/bindings/spi/snps,dw-apb-ssi.txt b/kernel/Documentation/devicetree/bindings/spi/snps,dw-apb-ssi.txt
new file mode 100644 (file)
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+++ b/kernel/Documentation/devicetree/bindings/spi/snps,dw-apb-ssi.txt
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+Synopsys DesignWare AMBA 2.0 Synchronous Serial Interface.
+
+Required properties:
+- compatible : "snps,dw-apb-ssi"
+- reg : The register base for the controller.
+- interrupts : One interrupt, used by the controller.
+- #address-cells : <1>, as required by generic SPI binding.
+- #size-cells : <0>, also as required by generic SPI binding.
+
+Optional properties:
+- cs-gpios : Specifies the gpio pis to be used for chipselects.
+- num-cs : The number of chipselects. If omitted, this will default to 4.
+
+Child nodes as per the generic SPI binding.
+
+Example:
+
+       spi@fff00000 {
+               compatible = "snps,dw-apb-ssi";
+               reg = <0xfff00000 0x1000>;
+               interrupts = <0 154 4>;
+               #address-cells = <1>;
+               #size-cells = <0>;
+               num-cs = <2>;
+               cs-gpios = <&gpio0 13 0>,
+                          <&gpio0 14 0>;
+       };
+