[PATCH 2/2] spi: Add DT bindings documentation for Netlogic XLP SPI controller

[<kamlakant.patel@xxxxxxxxxxxx>]

From: Kamlakant Patel <kamlakant.patel@xxxxxxxxxxxx>

Add DT bindings documentation for SPI controller driver used by
Netlogic XLP MIPS64 SoCs.

Signed-off-by: Kamlakant Patel <kamlakant.patel@xxxxxxxxxxxx>
---
 Documentation/devicetree/bindings/spi/spi-xlp.txt |   40 +++++++++++++++++++++
 1 files changed, 40 insertions(+), 0 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/spi/spi-xlp.txt

diff --git a/Documentation/devicetree/bindings/spi/spi-xlp.txt b/Documentation/devicetree/bindings/spi/spi-xlp.txt
new file mode 100644
index 0000000..a8bbca3
--- /dev/null
+++ b/Documentation/devicetree/bindings/spi/spi-xlp.txt
@@ -0,0 +1,40 @@
+SPI Master controller for Netlogic XLP MIPS64 SOCs
+==================================================
+
+Currently this SPI controller driver is supported for the following
+Netlogic XLP SoCs:
+	XLP832, XLP316, XLP208, XLP980, XLP532
+
+Required properties:
+- compatible	: Should be "netlogic,xlp832-spi".
+- #address-cell	: Number of cells required to define a chip select address
+		  on the SPI bus.
+- #size-cells	: Should be zero.
+- reg:		: Should contain register location and length.
+- interrupts	: Interrupt number used by this controller.
+- interrupt-parent: Phandle of the parent interrupt controller.
+- clock-frequency : [OPTIONAL] Input clock frequency to the SPI block in Hz.
+		    Default is 133333333 Hz.
+
+SPI slave nodes must be children of the SPI master node and can contain
+properties described in Documentation/devicetree/bindings/spi/spi-bus.txt.
+
+Example:
+
+	spi: xlp_spi@3a100 {
+		compatible = "netlogic,xlp832-spi";
+		#address-cells = <1>;
+		#size-cells = <0>;
+		reg = <0 0x3a100 0x100>;
+		clock-frequency = <133333333>;
+		interrupts = <34>;
+		interrupt-parent = <&pic>;
+
+		spi_nor@1 {
+			compatible = "spansion,s25sl12801";
+			#address-cells = <1>;
+			#size-cells = <1>;
+			reg = <1>;	/* Chip Select */
+			spi-max-frequency = <40000000>;
+		};
+};
-- 
1.7.1

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