Commit e48bc01e authored Jun 30, 2020 by Gwendal Grignou Committed by Enric Balletbo i Serra Jun 30, 2020

platform/chrome: cros_ec_sensorhub: Fix EC timestamp overflow

EC is using 32 bit timestamps (us), and before converting it to 64bit
they were not casted, so it would overflow every 4s.
Regular overflow every ~70 minutes was not taken into account either.

Signed-off-by: Gwendal Grignou <gwendal@chromium.org>
Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>

parent 20b73687

drivers/platform/chrome/cros_ec_sensorhub_ring.c

+1 −3

Original line number	Diff line number	Diff line
		@@ -419,9 +419,7 @@ cros_ec_sensor_ring_process_event(struct cros_ec_sensorhub *sensorhub,
		* Disable filtering since we might add more jitter
		* if b is in a random point in time.
		*/
		new_timestamp = fifo_timestamp -
		fifo_info->timestamp * 1000 +
		in->timestamp * 1000;
		new_timestamp = c - b * 1000 + a * 1000;
		/*
		* The timestamp can be stale if we had to use the fifo
		* info timestamp.