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| author | Jean-Baptiste Maneyrol <jean-baptiste.maneyrol@tdk.com> | 2024-05-29 15:47:17 +0000 |
|---|---|---|
| committer | Jonathan Cameron <Jonathan.Cameron@huawei.com> | 2024-06-02 11:56:40 +0100 |
| commit | d7bd473632d07f8a54655c270c0940cc3671c548 (patch) | |
| tree | 9286b850a08110db7ecdea1fa2b36fc743d37186 /drivers/iio/imu/inv_icm42600/inv_icm42600_buffer.h | |
| parent | 95444b9eeb8c5c0330563931d70c61ca3b101548 (diff) | |
| download | linux-d7bd473632d07f8a54655c270c0940cc3671c548.tar.gz linux-d7bd473632d07f8a54655c270c0940cc3671c548.tar.bz2 linux-d7bd473632d07f8a54655c270c0940cc3671c548.zip | |
iio: imu: inv_icm42600: stabilized timestamp in interrupt
Use IRQF_ONESHOT flag to ensure the timestamp is not updated in the
hard handler during the thread handler. And compute and use the
effective watermark value that correspond to this first timestamp.
This way we can ensure the timestamp is always corresponding to the
value used by the timestamping mechanism. Otherwise, it is possible
that between FIFO count read and FIFO processing the timestamp is
overwritten in the hard handler.
Fixes: ec74ae9fd37c ("iio: imu: inv_icm42600: add accurate timestamping")
Cc: stable@vger.kernel.org
Signed-off-by: Jean-Baptiste Maneyrol <jean-baptiste.maneyrol@tdk.com>
Link: https://lore.kernel.org/r/20240529154717.651863-1-inv.git-commit@tdk.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Diffstat (limited to 'drivers/iio/imu/inv_icm42600/inv_icm42600_buffer.h')
| -rw-r--r-- | drivers/iio/imu/inv_icm42600/inv_icm42600_buffer.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/iio/imu/inv_icm42600/inv_icm42600_buffer.h b/drivers/iio/imu/inv_icm42600/inv_icm42600_buffer.h index 8b85ee333bf8..f6c85daf42b0 100644 --- a/drivers/iio/imu/inv_icm42600/inv_icm42600_buffer.h +++ b/drivers/iio/imu/inv_icm42600/inv_icm42600_buffer.h @@ -32,6 +32,8 @@ struct inv_icm42600_fifo { struct { unsigned int gyro; unsigned int accel; + unsigned int eff_gyro; + unsigned int eff_accel; } watermark; size_t count; struct { |