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| author | Lars-Peter Clausen <lars@metafoo.de> | 2013-01-09 14:01:00 +0000 |
|---|---|---|
| committer | Jonathan Cameron <jic23@kernel.org> | 2013-01-09 21:15:33 +0000 |
| commit | a02a8c42b588059aa06dff6f614a7afcba12df69 (patch) | |
| tree | 38dc5486e08fdfe602c369f4f3db833700ee6b3e | |
| parent | 7b7a4efe76a8a96b20f7ac8047869f43e65b10e4 (diff) | |
| download | op-kernel-dev-a02a8c42b588059aa06dff6f614a7afcba12df69.zip op-kernel-dev-a02a8c42b588059aa06dff6f614a7afcba12df69.tar.gz | |
staging:iio:adis16080: Perform sign extension
The adis16080 reports sample values in twos complement. So we need to perform a
sign extension on the result, otherwise negative values will be reported
incorrectly as large positive values.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
| -rw-r--r-- | drivers/staging/iio/gyro/adis16080_core.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/staging/iio/gyro/adis16080_core.c b/drivers/staging/iio/gyro/adis16080_core.c index 3525a68..41d7350 100644 --- a/drivers/staging/iio/gyro/adis16080_core.c +++ b/drivers/staging/iio/gyro/adis16080_core.c @@ -69,7 +69,7 @@ static int adis16080_spi_read(struct iio_dev *indio_dev, ret = spi_read(st->us, st->buf, 2); if (ret == 0) - *val = ((st->buf[0] & 0xF) << 8) | st->buf[1]; + *val = sign_extend32(((st->buf[0] & 0xF) << 8) | st->buf[1], 11); mutex_unlock(&st->buf_lock); return ret; |
