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| author | Linus Walleij <linus.walleij@linaro.org> | 2016-09-01 11:44:35 +0200 |
|---|---|---|
| committer | Jiri Slaby <jslaby@suse.cz> | 2016-09-29 11:14:24 +0200 |
| commit | 2f8c95d916594d62694807666fae72335e302fae (patch) | |
| tree | 4a75d63aa6369406312cb04515e2e319123b42b9 /drivers | |
| parent | 523e1dd7c34ecd807bd7fef25f8ef0c46c3245a9 (diff) | |
| download | lwn-2f8c95d916594d62694807666fae72335e302fae.tar.gz lwn-2f8c95d916594d62694807666fae72335e302fae.zip | |
iio: accel: kxsd9: Fix scaling bug
commit 307fe9dd11ae44d4f8881ee449a7cbac36e1f5de upstream.
All the scaling of the KXSD9 involves multiplication with a
fraction number < 1.
However the scaling value returned from IIO_INFO_SCALE was
unpredictable as only the micros of the value was assigned, and
not the integer part, resulting in scaling like this:
$cat in_accel_scale
-1057462640.011978
Fix this by assigning zero to the integer part.
Tested-by: Jonathan Cameron <jic23@kernel.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/iio/accel/kxsd9.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/iio/accel/kxsd9.c b/drivers/iio/accel/kxsd9.c index 39220a11f530..ed60a8806f01 100644 --- a/drivers/iio/accel/kxsd9.c +++ b/drivers/iio/accel/kxsd9.c @@ -166,6 +166,7 @@ static int kxsd9_read_raw(struct iio_dev *indio_dev, ret = spi_w8r8(st->us, KXSD9_READ(KXSD9_REG_CTRL_C)); if (ret < 0) goto error_ret; + *val = 0; *val2 = kxsd9_micro_scales[ret & KXSD9_FS_MASK]; ret = IIO_VAL_INT_PLUS_MICRO; break; |