iio: light: Add support for ADUX1020 sensor

Add initial support for Analog Devices ADUX1020 Photometric sensor.
Only proximity mode has been enabled for now.
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

drivers/iio/light/Kconfig

@@ -32,6 +32,17 @@ config ADJD_S311
 	  This driver can also be built as a module.  If so, the module
 	  will be called adjd_s311.
 
+config ADUX1020
+	tristate "ADUX1020 photometric sensor"
+	select REGMAP_I2C
+	depends on I2C
+	help
+	 Say Y here if you want to build a driver for the Analog Devices
+	 ADUX1020 photometric sensor.
+
+	 To compile this driver as a module, choose M here: the
+	 module will be called adux1020.
+
 config AL3320A
 	tristate "AL3320A ambient light sensor"
 	depends on I2C

drivers/iio/light/Makefile

@@ -6,6 +6,7 @@
 # When adding new entries keep the list in alphabetical order
 obj-$(CONFIG_ACPI_ALS)		+= acpi-als.o
 obj-$(CONFIG_ADJD_S311)		+= adjd_s311.o
+obj-$(CONFIG_ADUX1020)		+= adux1020.o
 obj-$(CONFIG_AL3320A)		+= al3320a.o
 obj-$(CONFIG_APDS9300)		+= apds9300.o
 obj-$(CONFIG_APDS9960)		+= apds9960.o