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iio: accel: hid-sensor-accel-3d: Add timestamp

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Added timestamp channel. With this change, each sample has a timestamp.
This timestamp can be from the sensor hub when present or local kernel
timestamp. HID sensors can send timestamp with input data using usage id
HID_USAGE_SENSOR_TIME_TIMESTAMP. This timestamp value is converted to
nano seconds before pushing this sample to the iio core.

Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
This commit is contained in:
Srinivas Pandruvada 2016-11-28 14:41:16 -08:00 • committed by Jonathan Cameron
parent 902c4b2446
commit a96cd0f901
4 changed files with 60 additions and 13 deletions
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1
include/linux/hid-sensor-ids.h
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@ -95,6 +95,7 @@
#define HID_USAGE_SENSOR_TIME_HOUR 0x200525
#define HID_USAGE_SENSOR_TIME_MINUTE 0x200526
#define HID_USAGE_SENSOR_TIME_SECOND 0x200527
#define HID_USAGE_SENSOR_TIME_TIMESTAMP 0x200529
/* Units */
#define HID_USAGE_SENSOR_UNITS_NOT_SPECIFIED 0x00