diff options
| -rw-r--r-- | drivers/iio/adc/max1363.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/iio/adc/max1363.c b/drivers/iio/adc/max1363.c index 65a2d92bb112..629c53af6472 100644 --- a/drivers/iio/adc/max1363.c +++ b/drivers/iio/adc/max1363.c @@ -404,6 +404,14 @@ static int max1363_read_single_chan(struct iio_dev *indio_dev, data = rxbuf[0]; } + + /* + * Differential channels are bipolar and the device returns the sample + * in two's complement, so sign-extend it from the resolution bit. + */ + if (chan->differential) + data = sign_extend32(data, st->chip_info->bits - 1); + *val = data; return 0; |