i2c/mux: Driver for PCA9541 I2C Master Selector

This patch adds support for PCA9541, an I2C Bus Master Selector.
The driver is modeled as single channel I2C Multiplexer to be able to utilize
the I2C multiplexer framework.
Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com>
Reviewed-by: Tom Grennan <tom.grennan@ericsson.com>
Acked-by: Jean Delvare <khali@linux-fr.org>

drivers/i2c/muxes/Kconfig

@@ -5,6 +5,16 @@
 menu "Multiplexer I2C Chip support"
 	depends on I2C_MUX
 
+config I2C_MUX_PCA9541
+	tristate "NXP PCA9541 I2C Master Selector"
+	depends on EXPERIMENTAL
+	help
+	  If you say yes here you get support for the NXP PCA9541
+	  I2C Master Selector.
+
+	  This driver can also be built as a module.  If so, the module
+	  will be called pca9541.
+
 config I2C_MUX_PCA954x
 	tristate "Philips PCA954x I2C Mux/switches"
 	depends on EXPERIMENTAL

drivers/i2c/muxes/Makefile

 #
 # Makefile for multiplexer I2C chip drivers.
 
+obj-$(CONFIG_I2C_MUX_PCA9541)	+= pca9541.o
 obj-$(CONFIG_I2C_MUX_PCA954x)	+= pca954x.o
 
 ccflags-$(CONFIG_I2C_DEBUG_BUS) := -DDEBUG