The HID Usage Table at https://usb.org/sites/default/files/hut1_5.pdf
reserves:

- 0x4b2 for Human Proximity Range
Distance between a human and the computer. Default unit of
measure is meters;
https://www.usb.org/sites/default/files/hutrr39b_0.pdf

- 0x4bd for Human Attention Detected
Human-Presence sensors detect the presence of humans in the sensor’s
field-of-view using diverse and evolving technologies. Some presence
sensors are implemented with low resolution video cameras, which can
additionally track a subject’s attention (i.e. if the
user is ‘looking’ at the system with the integrated sensor).
A Human-Presence sensor, providing a Host with the user’s attention
state, allows the Host to optimize its behavior. For example, to
brighten/dim the system display, based on the user’s attention to the
system (potentially prolonging battery life). Default unit is
true/false;
https://www.usb.org/sites/default/files/hutrr107-humanpresenceattention_1.pdf

Signed-off-by: Ricardo Ribalda <ribalda@chromium.org>
---
 include/linux/hid-sensor-ids.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/include/linux/hid-sensor-ids.h b/include/linux/hid-sensor-ids.h
index 6730ee900ee1..8a03d9696b1c 100644
--- a/include/linux/hid-sensor-ids.h
+++ b/include/linux/hid-sensor-ids.h
@@ -30,6 +30,8 @@
 #define HID_USAGE_SENSOR_PROX                                   0x200011
 #define HID_USAGE_SENSOR_DATA_PRESENCE                          0x2004b0
 #define HID_USAGE_SENSOR_HUMAN_PRESENCE                         0x2004b1
+#define HID_USAGE_SENSOR_HUMAN_PROXIMITY                        0x2004b2
+#define HID_USAGE_SENSOR_HUMAN_ATTENTION                        0x2004bd
 
 /* Pressure (200031) */
 #define HID_USAGE_SENSOR_PRESSURE                               0x200031

-- 
2.47.0.163.g1226f6d8fa-goog