staging: iio: adc: new driver for AD7291 devices

Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Acked-by: Jonathan Cameron <jic23@cam.ac.uk>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/iio/adc/Kconfig

@@ -41,6 +41,13 @@ config AD7152
 	  Say yes here to build support for Analog Devices capacitive sensors.
 	  (ad7152, ad7153) Provides direct access via sysfs.
 
+config AD7291
+	tristate "Analog Devices AD7291 temperature sensor driver"
+	depends on I2C
+	help
+	  Say yes here to build support for Analog Devices AD7291
+	  temperature sensors.
+
 config AD799X
 	tristate "Analog Devices AD799x ADC driver"
 	depends on I2C

drivers/staging/iio/adc/Makefile

@@ -17,3 +17,4 @@ obj-$(CONFIG_AD7476) += ad7476.o
 
 obj-$(CONFIG_AD7150) += ad7150.o
 obj-$(CONFIG_AD7152) += ad7152.o
+obj-$(CONFIG_AD7291) += ad7291.o