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iio: adc: ad7793: use iio helper function to guarantee direct mode 

Replace the code that guarantees the device stays in direct mode
with iio_device_claim_direct_mode() which does same.

Signed-off-by: Alison Schofield <amsfield22@gmail.com>
Cc: Daniel Baluta <daniel.baluta@gmail.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
This commit is contained in:
Alison Schofield 2016-07-18 12:35:24 -07:00 committed by Jonathan Cameron
parent 4d19c48755
commit b4d46409d6
1 changed files with 4 additions and 6 deletions
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10
drivers/iio/adc/ad7793.c
View File

@ -519,11 +519,9 @@ static int ad7793_write_raw(struct iio_dev *indio_dev,
int ret, i;
unsigned int tmp;
mutex_lock(&indio_dev->mlock);
if (iio_buffer_enabled(indio_dev)) {
mutex_unlock(&indio_dev->mlock);
return -EBUSY;
}
ret = iio_device_claim_direct_mode(indio_dev);
if (ret)
return ret;
switch (mask) {
case IIO_CHAN_INFO_SCALE:
@ -548,7 +546,7 @@ static int ad7793_write_raw(struct iio_dev *indio_dev,
ret = -EINVAL;
}
mutex_unlock(&indio_dev->mlock);
iio_device_release_direct_mode(indio_dev);
return ret;
}