While a calibration is running, better don't make the device do anything
else.
To enforce that, grab direct mode during calibration.
Fixes: 031bdc8aee01 ("iio: adc: ad7173: add calibration support")
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@xxxxxxxxxxxx>
---
drivers/iio/adc/ad7173.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/iio/adc/ad7173.c b/drivers/iio/adc/ad7173.c
index 962033393943..110539a2b112 100644
--- a/drivers/iio/adc/ad7173.c
+++ b/drivers/iio/adc/ad7173.c
@@ -349,6 +349,9 @@ static ssize_t ad7173_write_syscalib(struct iio_dev *indio_dev,
if (ret)
return ret;
+ if (!iio_device_claim_direct(indio_dev))
+ return -EBUSY;
+
mode = st->channels[chan->channel].syscalib_mode;
if (sys_calib) {
if (mode == AD7173_SYSCALIB_ZERO_SCALE)
@@ -359,6 +362,8 @@ static ssize_t ad7173_write_syscalib(struct iio_dev *indio_dev,
chan->address);
}
+ iio_device_release_direct(indio_dev);
+
return ret ? : len;
}
--
2.47.1
