iio: hid: Add humidity sensor support
Environmental humidity sensor is a hid defined sensor,
it shows raw humidity measurement of air.
More information can be found in:
http://www.usb.org/developers/hidpage/HUTRR39b.pdf
According to IIO ABI definition, humidityrelative data output unit is
milli percent. Add the unit convert from percent to milli percent.
Signed-off-by: Song Hongyan <hongyan.song@intel.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
diff --git a/include/linux/hid-sensor-ids.h b/include/linux/hid-sensor-ids.h
index 46dd1f2..761f862 100644
--- a/include/linux/hid-sensor-ids.h
+++ b/include/linux/hid-sensor-ids.h
@@ -49,6 +49,10 @@
#define HID_USAGE_SENSOR_TEMPERATURE 0x200033
#define HID_USAGE_SENSOR_DATA_ENVIRONMENTAL_TEMPERATURE 0x200434
+/* humidity */
+#define HID_USAGE_SENSOR_HUMIDITY 0x200032
+#define HID_USAGE_SENSOR_ATMOSPHERIC_HUMIDITY 0x200433
+
/* Gyro 3D: (200076) */
#define HID_USAGE_SENSOR_GYRO_3D 0x200076
#define HID_USAGE_SENSOR_DATA_ANGL_VELOCITY 0x200456