i2c/nuc900: add i2c driver support for nuc900

This patch is to add i2c driver support for nuc900.
Signed-off-by: Wan ZongShun <mcuos.com@gmail.org>
Reviewed-by: Marek Vasut <marek.vasut@gmail.com>
Reviewed-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>

arch/arm/mach-w90x900/include/mach/i2c.h

+#ifndef __ASM_ARCH_NUC900_I2C_H
+#define __ASM_ARCH_NUC900_I2C_H
+
+struct nuc900_platform_i2c {
+	int		bus_num;
+	unsigned long   bus_freq;
+};
+
+#endif /* __ASM_ARCH_NUC900_I2C_H */

drivers/i2c/busses/Kconfig

@@ -448,6 +448,13 @@ config I2C_NOMADIK
 	  If you say yes to this option, support will be included for the
 	  I2C interface from ST-Ericsson's Nomadik and Ux500 architectures.
 
+config I2C_NUC900
+	tristate "NUC900 I2C Driver"
+	depends on ARCH_W90X900
+	help
+	  Say Y here to include support for I2C controller in the
+	  Winbond/Nuvoton NUC900 based System-on-Chip devices.
+
 config I2C_OCORES
 	tristate "OpenCores I2C Controller"
 	depends on EXPERIMENTAL

drivers/i2c/busses/Makefile

@@ -43,6 +43,7 @@ obj-$(CONFIG_I2C_IXP2000)	+= i2c-ixp2000.o
 obj-$(CONFIG_I2C_MPC)		+= i2c-mpc.o
 obj-$(CONFIG_I2C_MV64XXX)	+= i2c-mv64xxx.o
 obj-$(CONFIG_I2C_NOMADIK)	+= i2c-nomadik.o
+obj-$(CONFIG_I2C_NUC900)	+= i2c-nuc900.o
 obj-$(CONFIG_I2C_OCORES)	+= i2c-ocores.o
 obj-$(CONFIG_I2C_OMAP)		+= i2c-omap.o
 obj-$(CONFIG_I2C_PASEMI)	+= i2c-pasemi.o