From: Nuno Sá Date: Mon, 12 Sep 2022 08:12:21 +0000 (+0200) Subject: iio: adc: ad7923: fix channel readings for some variants X-Git-Tag: v5.15.79~1003 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=5f6bfc1926bb9fd932267b11a07e13304d77d680;p=platform%2Fkernel%2Flinux-rpi.git iio: adc: ad7923: fix channel readings for some variants commit f4f43f01cff2f29779343ade755191afd2581c77 upstream. Some of the supported devices have 4 or 2 LSB trailing bits that should not be taken into account. Hence we need to shift these bits out which fits perfectly on the scan type shift property. This change fixes both raw and buffered reads. Fixes: f2f7a449707e ("iio:adc:ad7923: Add support for the ad7904/ad7914/ad7924") Fixes: 851644a60d20 ("iio: adc: ad7923: Add support for the ad7908/ad7918/ad7928") Signed-off-by: Nuno Sá Link: https://lore.kernel.org/r/20220912081223.173584-2-nuno.sa@analog.com Cc: Signed-off-by: Jonathan Cameron Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/iio/adc/ad7923.c b/drivers/iio/adc/ad7923.c index 069b561..b8cc94b 100644 --- a/drivers/iio/adc/ad7923.c +++ b/drivers/iio/adc/ad7923.c @@ -93,6 +93,7 @@ enum ad7923_id { .sign = 'u', \ .realbits = (bits), \ .storagebits = 16, \ + .shift = 12 - (bits), \ .endianness = IIO_BE, \ }, \ } @@ -268,7 +269,8 @@ static int ad7923_read_raw(struct iio_dev *indio_dev, return ret; if (chan->address == EXTRACT(ret, 12, 4)) - *val = EXTRACT(ret, 0, 12); + *val = EXTRACT(ret, chan->scan_type.shift, + chan->scan_type.realbits); else return -EIO;