While a calibration is running, better don't make the device do anything
else.
To enforce that, grab direct mode during calibration.
Fixes: 42776c14c692 ("staging: iio: adc: ad7192: Add system calibration support")
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@xxxxxxxxxxxx>
---
drivers/iio/adc/ad7192.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/iio/adc/ad7192.c b/drivers/iio/adc/ad7192.c
index e96a5ae92375..6d06c48612ed 100644
--- a/drivers/iio/adc/ad7192.c
+++ b/drivers/iio/adc/ad7192.c
@@ -256,6 +256,9 @@ static ssize_t ad7192_write_syscalib(struct iio_dev *indio_dev,
if (ret)
return ret;
+ if (!iio_device_claim_direct(indio_dev))
+ return -EBUSY;
+
temp = st->syscalib_mode[chan->channel];
if (sys_calib) {
if (temp == AD7192_SYSCALIB_ZERO_SCALE)
@@ -266,6 +269,8 @@ static ssize_t ad7192_write_syscalib(struct iio_dev *indio_dev,
chan->address);
}
+ iio_device_release_direct(indio_dev);
+
return ret ? ret : len;
}
--
2.47.1
