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iio: accel: sca3000: Use sign_extend32() instead of opencoding sign extension.

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Whilst nice to get rid of this non obvious code, this also clears a
static checker warning:

drivers/iio/accel/sca3000.c:734 sca3000_read_raw()
warn: no-op. '((*val) << 19) >> 19'

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Lars-Peter Clausen <lars@metafoo.de>
Link: https://lore.kernel.org/r/20211017160303.72441-1-jic23@kernel.org
This commit is contained in:
Jonathan Cameron 2021-10-17 17:03:03 +01:00
parent dd4efd05c5
commit 1ea3615b61
1 changed files with 1 additions and 2 deletions
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3
drivers/iio/accel/sca3000.c
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@ -731,8 +731,7 @@ static int sca3000_read_raw(struct iio_dev *indio_dev,
return ret;
}
*val = (be16_to_cpup((__be16 *)st->rx) >> 3) & 0x1FFF;
*val = ((*val) << (sizeof(*val) * 8 - 13)) >>
(sizeof(*val) * 8 - 13);
*val = sign_extend32(*val, 12);
} else {
/* get the temperature when available */
ret = sca3000_read_data_short(st,