linux

iv/linux

History

Nuno Sa 0463e60f08 iio: adis16480: fix pps mode sampling frequency math

When using PPS mode, the input clock needs to be scaled so that we have
an IMU sample rate between (optimally) 4000 and 4250. After this, we can
use the decimation filter to lower the sampling rate in order to get what
the user wants. Optimally, the user sample rate is a multiple of both the
IMU sample rate and the input clock. Hence, calculating the sync_scale
dynamically gives us better chances of achieving a perfect/integer value
for DEC_RATE. The math here is:
 1. lcm of the input clock and the desired output rate.
 2. get the highest multiple of the previous result lower than the adis
    max rate.
 3. The last result becomes the IMU sample rate. Use that to calculate
    SYNC_SCALE and DEC_RATE (to get the user output rate).

Fixes: 326e2357553d3 ("iio: imu: adis16480: Add support for external clock")

Signed-off-by: Nuno Sa <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20210218114039.216091-2-nuno.sa@analog.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

2021-03-11 20:47:11 +00:00

bmi160

iio:imu:bmi160: Fix alignment and data leak issues

2020-12-03 19:40:28 +00:00

inv_icm42600

iio: make use of devm_iio_kfifo_buffer_setup() helper

2021-03-11 20:47:01 +00:00

inv_mpu6050

iio: imu: inv_mpu6050: Add support for MPU-6880

2021-01-09 14:25:30 +00:00

st_lsm6dsx

iio: make use of devm_iio_kfifo_buffer_setup() helper