58 	return cb(indio_dev, sample->vector, sample->timestamp);  in cros_sensorhub_send_sample()
205  * IRQ Timestamp Filtering
208  * we have to calculate it's timestamp in the AP timebase. There are 3 time
257  * @b: IRQ timestamp, EC timebase (us)
258  * @c: IRQ timestamp, AP timebase (ns)
260  * Given a new IRQ timestamp pair (EC and AP timebases), add it to the filter
340  * cros_ec_sensor_ring_ts_filter() - Translate EC timebase timestamp to AP
344  * @x: any ec timestamp (us):
346  * cros_ec_sensor_ring_ts_filter(a) => a' event timestamp, AP timebase
347  * cros_ec_sensor_ring_ts_filter(b) => calculated timestamp when the EC IRQ
362  * Return: timestamp in AP timebase (ns)
404 	    sample->timestamp)  in cros_ec_sensor_ring_check_for_past_timestamp()
406 		sample->timestamp =  in cros_ec_sensor_ring_check_for_past_timestamp()
410 			sample->timestamp;  in cros_ec_sensor_ring_check_for_past_timestamp()
419  * @current_timestamp: calculated event timestamp, kernel timebase (aka a').
444 		s64 a = in->timestamp;  in cros_ec_sensor_ring_process_event()
445 		s64 b = fifo_info->timestamp;  in cros_ec_sensor_ring_process_event()
467 			 * The timestamp can be stale if we had to use the fifo  in cros_ec_sensor_ring_process_event()
468 			 * info timestamp.  in cros_ec_sensor_ring_process_event()
473 		trace_cros_ec_sensorhub_timestamp(in->timestamp,  in cros_ec_sensor_ring_process_event()
474 						  fifo_info->timestamp,  in cros_ec_sensor_ring_process_event()
494 		out->timestamp = *current_timestamp;  in cros_ec_sensor_ring_process_event()
506 		/* If we just have a timestamp, skip this entry. */  in cros_ec_sensor_ring_process_event()
512 				     fifo_info->timestamp,  in cros_ec_sensor_ring_process_event()
519 		 * This fix is needed to overcome the timestamp filter putting  in cros_ec_sensor_ring_process_event()
534 		out->timestamp = now;  in cros_ec_sensor_ring_process_event()
536 		out->timestamp = *current_timestamp;  in cros_ec_sensor_ring_process_event()
552  * This is the new spreading code, assumes every sample's timestamp
555  * Sometimes the EC receives only one interrupt (hence timestamp) for
557  * timestamp. So we must interpolate the other samples.
558  * We use the previous batch timestamp and our current batch timestamp
566  * s3 sample, 20ms (incorrect timestamp)
570  * has 2 samples in them, we adjust the timestamp of s3.
592 			 * timestamp).  in cros_ec_sensor_ring_spread_add()
598 			s64 batch_timestamp = batch_start->timestamp;  in cros_ec_sensor_ring_spread_add()
622 			if (batch_start->timestamp <=  in cros_ec_sensor_ring_spread_add()
647 			/* Find all samples have the same timestamp. */  in cros_ec_sensor_ring_spread_add()
655 				if (s->timestamp != batch_timestamp)  in cros_ec_sensor_ring_spread_add()
704 				s->timestamp = batch_timestamp +  in cros_ec_sensor_ring_spread_add()
730  * Note: This assumes we're running old firmware, where timestamp
732  * timestamps, so several samples can have the same timestamp.
734  *                        timestamp | count
758 		s64 timestamp;  in cros_ec_sensor_ring_spread_add_legacy()  local
766 			/* Timestamp to start with */  in cros_ec_sensor_ring_spread_add_legacy()
767 			timestamp = out->timestamp;  in cros_ec_sensor_ring_spread_add_legacy()
782 		time_period = div_s64(current_timestamp - timestamp, count);  in cros_ec_sensor_ring_spread_add_legacy()
787 			timestamp += time_period;  in cros_ec_sensor_ring_spread_add_legacy()
788 			out->timestamp = timestamp;  in cros_ec_sensor_ring_spread_add_legacy()
912 	 * the EC appends a timestamp after the last sample, but if the AP  in cros_ec_sensorhub_ring_handler()
914 	 * Use the FIFO info timestamp as last timestamp then.  in cros_ec_sensorhub_ring_handler()
917 	    (last_out - 1)->timestamp == current_timestamp)  in cros_ec_sensorhub_ring_handler()