Staging: IIO: tsl2561 digital light sensor core support

This is a pretty minimalist example of an IIO driver.

Signed-off-by: Jonathan Cameron <jic23@cam.ac.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/staging/iio/light/Kconfig b/drivers/staging/iio/light/Kconfig
new file mode 100644
index 0000000..12af0c4
--- /dev/null
+++ b/drivers/staging/iio/light/Kconfig
@@ -0,0 +1,13 @@
+#
+# Light sensors
+#
+comment "Light sensors"
+
+config TSL2561
+       tristate "TAOS TSL2561 light-to-digital convertor"
+       depends on I2C
+       help
+	Say yes bere to build support for the TAOS light to digital
+	convertor.  This chip has two light sensors. One is broadband
+	including infrared whilst the other measures only infrared.
+	Provides direct access via sysfs.