diff options
| author | Gwendal Grignou <gwendal@chromium.org> | 2021-11-04 11:24:08 +0300 |
|---|---|---|
| committer | Jonathan Cameron <Jonathan.Cameron@huawei.com> | 2021-11-21 16:45:23 +0300 |
| commit | 652e7df485c6884d552085ae2c73efa6cfea3547 (patch) | |
| tree | e1aeaffaec5814e7ed708605d5e360c25372e77f /drivers/iio | |
| parent | 92beafb76a31bdc02649eb44e93a8e4f4cfcdbe8 (diff) | |
| download | linux-652e7df485c6884d552085ae2c73efa6cfea3547.tar.xz | |
iio: at91-sama5d2: Fix incorrect sign extension
Use scan_type when processing raw data which also fixes that the sign
extension was from the wrong bit.
Use channel definition as root of trust and replace constant
when reading elements directly using the raw sysfs attributes.
Fixes: 6794e23fa3fe ("iio: adc: at91-sama5d2_adc: add support for oversampling resolution")
Signed-off-by: Gwendal Grignou <gwendal@chromium.org>
Reviewed-by: Eugen Hristev <eugen.hristev@microchip.com>
Cc: <Stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20211104082413.3681212-9-gwendal@chromium.org
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Diffstat (limited to 'drivers/iio')
| -rw-r--r-- | drivers/iio/adc/at91-sama5d2_adc.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/iio/adc/at91-sama5d2_adc.c b/drivers/iio/adc/at91-sama5d2_adc.c index 4c922ef634f8..92a57cf10fba 100644 --- a/drivers/iio/adc/at91-sama5d2_adc.c +++ b/drivers/iio/adc/at91-sama5d2_adc.c @@ -1586,7 +1586,8 @@ static int at91_adc_read_info_raw(struct iio_dev *indio_dev, *val = st->conversion_value; ret = at91_adc_adjust_val_osr(st, val); if (chan->scan_type.sign == 's') - *val = sign_extend32(*val, 11); + *val = sign_extend32(*val, + chan->scan_type.realbits - 1); st->conversion_done = false; } |