Tested-by: Mario Tesi <mario.tesi@xxxxxx>
________________________________________
Da: Lorenzo Bianconi <lorenzo@xxxxxxxxxx>
Inviato: lunedì 31 gennaio 2022 12:08
A: jic23@xxxxxxxxxx
Cc: lorenzo.bianconi@xxxxxxxxxx; linux-iio@xxxxxxxxxxxxxxx; Mario TESI
Oggetto: [PATCH] iio: imu: st_lsm6dsx: wait for settling time in st_lsm6dsx_read_oneshot
We need to wait for sensor settling time (~ 3/ODR) before reading data
in st_lsm6dsx_read_oneshot routine in order to avoid corrupted samples.
Reported-by: Mario Tesi <mario.tesi@xxxxxx>
Signed-off-by: Lorenzo Bianconi <lorenzo@xxxxxxxxxx>
---
drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c
index 727b4b6ac696..93f0c6bce502 100644
--- a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c
+++ b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c
@@ -1374,8 +1374,12 @@ static int st_lsm6dsx_read_oneshot(struct st_lsm6dsx_sensor *sensor,
if (err < 0)
return err;
+ /*
+ * we need to wait for sensor settling time before
+ * reading data in order to avoid corrupted samples
+ */
delay = 1000000000 / sensor->odr;
- usleep_range(delay, 2 * delay);
+ usleep_range(3 * delay, 4 * delay);
err = st_lsm6dsx_read_locked(hw, addr, &data, sizeof(data));
if (err < 0)
--
2.34.1
