[PATCH 2/5] iio: hid-sensor-als: Support change sensitivity in illuminance too.

[Ronald Tschalär]

Recent MacBook Pro's specify the usage of the change sensitivity field
as illuminance (with a change sensitivity modifier) rather than as
light.

Signed-off-by: Ronald Tschalär <ronald@xxxxxxxxxxxxx>
---
 drivers/iio/light/hid-sensor-als.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/iio/light/hid-sensor-als.c b/drivers/iio/light/hid-sensor-als.c
index a21c827e4953d..849ee37dcd866 100644
--- a/drivers/iio/light/hid-sensor-als.c
+++ b/drivers/iio/light/hid-sensor-als.c
@@ -252,6 +252,14 @@ static int als_parse_report(struct platform_device *pdev,
 			HID_USAGE_SENSOR_DATA_MOD_CHANGE_SENSITIVITY_ABS |
 			HID_USAGE_SENSOR_DATA_LIGHT,
 			&st->common_attributes.sensitivity);
+
+		if (st->common_attributes.sensitivity.index < 0)
+			sensor_hub_input_get_attribute_info(hsdev,
+				HID_FEATURE_REPORT, usage_id,
+				HID_USAGE_SENSOR_DATA_MOD_CHANGE_SENSITIVITY_ABS |
+				HID_USAGE_SENSOR_LIGHT_ILLUM,
+				&st->common_attributes.sensitivity);
+
 		dev_dbg(&pdev->dev, "Sensitivity index:report %d:%d\n",
 			st->common_attributes.sensitivity.index,
 			st->common_attributes.sensitivity.report_id);
-- 
2.26.2