spi: Add SPI master controller for OCTEON SOCs.

Add the driver, link it into the kbuild system and provide device tree
binding documentation.

Signed-off-by: David Daney <david.daney@cavium.com>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Patchwork: http://patchwork.linux-mips.org/patch/4292/
Signed-off-by: John Crispin <blogic@openwrt.org>

Documentation/devicetree/bindings/spi/spi-octeon.txt

@@ -0,0 +1,33 @@
+Cavium, Inc. OCTEON SOC SPI master controller.
+
+Required properties:
+- compatible : "cavium,octeon-3010-spi"
+- 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.
+
+Child nodes as per the generic SPI binding.
+
+Example:
+
+	spi@1070000001000 {
+		compatible = "cavium,octeon-3010-spi";
+		reg = <0x10700 0x00001000 0x0 0x100>;
+		interrupts = <0 58>;
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		eeprom@0 {
+			compatible = "st,m95256", "atmel,at25";
+			reg = <0>;
+			spi-max-frequency = <5000000>;
+			spi-cpha;
+			spi-cpol;
+
+			pagesize = <64>;
+			size = <32768>;
+			address-width = <16>;
+		};
+	};
+

drivers/spi/Kconfig

@@ -237,6 +237,13 @@ config SPI_OC_TINY
 	help
 	  This is the driver for OpenCores tiny SPI master controller.
 
+config SPI_OCTEON
+	tristate "Cavium OCTEON SPI controller"
+	depends on CPU_CAVIUM_OCTEON
+	help
+	  SPI host driver for the hardware found on some Cavium OCTEON
+	  SOCs.
+
 config SPI_OMAP_UWIRE
 	tristate "OMAP1 MicroWire"
 	depends on ARCH_OMAP1

drivers/spi/Makefile

@@ -38,6 +38,7 @@ obj-$(CONFIG_SPI_MPC52xx_PSC)		+= spi-mpc52xx-psc.o
 obj-$(CONFIG_SPI_MPC52xx)		+= spi-mpc52xx.o
 obj-$(CONFIG_SPI_NUC900)		+= spi-nuc900.o
 obj-$(CONFIG_SPI_OC_TINY)		+= spi-oc-tiny.o
+obj-$(CONFIG_SPI_OCTEON)		+= spi-octeon.o
 obj-$(CONFIG_SPI_OMAP_UWIRE)		+= spi-omap-uwire.o
 obj-$(CONFIG_SPI_OMAP_100K)		+= spi-omap-100k.o
 obj-$(CONFIG_SPI_OMAP24XX)		+= spi-omap2-mcspi.o