From: Jean-Baptiste Maneyrol jean-baptiste.maneyrol@tdk.com
ODR switching happens in 2 steps, update to store the new value and then apply when the ODR change flag is received in the data. When switching to the same ODR value, the ODR change flag is never happening, and frequency switching is blocked waiting for the never coming apply.
Fix the issue by preventing update to happen when switching to same ODR value.
Fixes: 0ecc363ccea7 ("iio: make invensense timestamp module generic") Cc: stable@vger.kernel.org Signed-off-by: Jean-Baptiste Maneyrol jean-baptiste.maneyrol@tdk.com --- drivers/iio/common/inv_sensors/inv_sensors_timestamp.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/drivers/iio/common/inv_sensors/inv_sensors_timestamp.c b/drivers/iio/common/inv_sensors/inv_sensors_timestamp.c index fa205f17bd90..f44458c380d9 100644 --- a/drivers/iio/common/inv_sensors/inv_sensors_timestamp.c +++ b/drivers/iio/common/inv_sensors/inv_sensors_timestamp.c @@ -60,11 +60,15 @@ EXPORT_SYMBOL_NS_GPL(inv_sensors_timestamp_init, IIO_INV_SENSORS_TIMESTAMP); int inv_sensors_timestamp_update_odr(struct inv_sensors_timestamp *ts, uint32_t period, bool fifo) { + uint32_t mult; + /* when FIFO is on, prevent odr change if one is already pending */ if (fifo && ts->new_mult != 0) return -EAGAIN;
- ts->new_mult = period / ts->chip.clock_period; + mult = period / ts->chip.clock_period; + if (mult != ts->mult) + ts->new_mult = mult;
return 0; }