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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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4
include/linux/hid-sensor-hub.h
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@ -232,6 +232,7 @@ struct hid_sensor_common {
atomic_t data_ready;
atomic_t user_requested_state;
struct iio_trigger *trigger;
int timestamp_ns_scale;
struct hid_sensor_hub_attribute_info poll;
struct hid_sensor_hub_attribute_info report_state;
struct hid_sensor_hub_attribute_info power_state;
@ -271,4 +272,7 @@ int hid_sensor_format_scale(u32 usage_id,
s32 hid_sensor_read_poll_value(struct hid_sensor_common *st);
int64_t hid_sensor_convert_timestamp(struct hid_sensor_common *st,
int64_t raw_value);
#endif