[PATCH v3 2/5] spi/davinci: add DT binding documentation

[Manjunathappa, Prakash]

From: Murali Karicheri <m-karicheri2 at ti.com>

Get back missed out binding documentation submitted along
with below patch:
"spi/davinci: add OF support for the spi controller"

[prakash.pm at ti.com: Follow DT naming convention for compatible property]
Signed-off-by: Murali Karicheri <m-karicheri2 at ti.com>
Reviewed-by: Grant Likely <grant.likely at secretlab.ca>
Signed-off-by: Manjunathappa, Prakash <prakash.pm at ti.com>
---
 .../devicetree/bindings/spi/spi-davinci.txt        |   51 ++++++++++++++++++++
 1 files changed, 51 insertions(+), 0 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/spi/spi-davinci.txt

diff --git a/Documentation/devicetree/bindings/spi/spi-davinci.txt b/Documentation/devicetree/bindings/spi/spi-davinci.txt
new file mode 100644
index 0000000..75ad9ac
--- /dev/null
+++ b/Documentation/devicetree/bindings/spi/spi-davinci.txt
@@ -0,0 +1,51 @@
+Davinci SPI controller device bindings
+
+Required properties:
+- #address-cells: number of cells required to define a chip select
+	address on the SPI bus. Should be set to 1.
+- #size-cells: should be zero.
+- compatible:
+	- "ti,dm6441-spi" for SPI used similar to that on DM644x SoC family
+	- "ti,da830-spi" for SPI used similar to that on DA8xx SoC family
+- reg: Offset and length of SPI controller register space
+- num-cs: Number of chip selects
+- ti,davinci-spi-intr-line: interrupt line used to connect the SPI
+	IP to the interrupt controller withn the SoC. Possible values
+	are 0 and 1. Manual says one of the two possible interrupt
+	lines can be tied to the interrupt controller. Set this
+	based on a specifc SoC configuration.
+- interrupts: interrupt number mapped to CPU.
+- clocks: spi clk phandle
+
+Example of a NOR flash slave device (n25q032) connected to DaVinci
+SPI controller device over the SPI bus.
+
+spi0:spi at 20BF0000 {
+	#address-cells	 = <1>;
+	#size-cells	 = <0>;
+	compatible	 = "ti,dm6446-spi";
+	reg	 = <0x20BF0000 0x1000>;
+	num-cs	 = <4>;
+	ti,davinci-spi-intr-line	= <0>;
+	interrupts	 = <338>;
+	clocks	 = <&clkspi>;
+
+	flash: n25q032 at 0 {
+	 #address-cells = <1>;
+	 #size-cells = <1>;
+	 compatible = "st,m25p32";
+	 spi-max-frequency = <25000000>;
+	 reg = <0>;
+
+	 partition at 0 {
+	 label = "u-boot-spl";
+	 reg = <0x0 0x80000>;
+	 read-only;
+	 };
+
+	 partition at 1 {
+	 label = "test";
+	 reg = <0x80000 0x380000>;
+	 };
+	};
+};
-- 
1.7.4.1