iio: imu: inv_icm42600: add accurate timestamping

Browse source

Add a timestamping mechanism for buffer that provides accurate
event timestamps when using watermark. This mechanism estimates
device internal clock by comparing FIFO interrupts delta time and
device elapsed time computed by parsing FIFO data.

Take interrupt timestamp in hard irq handler and add IIO device
specific timestamp structures in device private allocation.

Signed-off-by: Jean-Baptiste Maneyrol <jmaneyrol@invensense.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

...

This commit is contained in:

Jean-Baptiste Maneyrol 2020-06-22 17:37:27 +02:00 • committed by Jonathan Cameron

parent 7f85e42a6c

commit ec74ae9fd3

8 changed files with 396 additions and 15 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

1

drivers/iio/imu/inv_icm42600/Makefile

View file

5

drivers/iio/imu/inv_icm42600/inv_icm42600.h

View file

40

drivers/iio/imu/inv_icm42600/inv_icm42600_accel.c

View file

28

drivers/iio/imu/inv_icm42600/inv_icm42600_buffer.c

View file

17

drivers/iio/imu/inv_icm42600/inv_icm42600_core.c

View file

40

drivers/iio/imu/inv_icm42600/inv_icm42600_gyro.c

View file

195

drivers/iio/imu/inv_icm42600/inv_icm42600_timestamp.c

View file

85

drivers/iio/imu/inv_icm42600/inv_icm42600_timestamp.h

View file