iio: imu: inv_mpu6050: new timestamp mechanism

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Check validity of interrupt timestamps by computing time between
2 interrupts. If it matches the chip frequency modulo 4%, it is
used as the data timestamp and also for estimating the chip
frequency measured from the system. Otherwise timestamp is
computed using the estimated chip frequency.

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

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Jean-Baptiste Maneyrol 2018-05-28 15:22:04 +02:00 • committed by Jonathan Cameron

parent 17f0361936

commit 4bcc19f1b2

3 changed files with 96 additions and 1 deletions

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7

drivers/iio/imu/inv_mpu6050/inv_mpu_core.c

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8

drivers/iio/imu/inv_mpu6050/inv_mpu_iio.h

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82

drivers/iio/imu/inv_mpu6050/inv_mpu_ring.c

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