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iio: accel: kxsd9: Fix scaling bug

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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.

Cc: stable@vger.kernel.org
Tested-by: Jonathan Cameron <jic23@kernel.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
This commit is contained in:
Linus Walleij 2016-09-01 11:44:35 +02:00 committed by Jonathan Cameron
parent 1c50084093
commit 307fe9dd11
1 changed files with 1 additions and 0 deletions
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drivers/iio/accel/kxsd9.c
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@ -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)); ret = spi_w8r8(st->us, KXSD9_READ(KXSD9_REG_CTRL_C));
if (ret < 0) if (ret < 0)
goto error_ret; goto error_ret;
*val = 0;
*val2 = kxsd9_micro_scales[ret & KXSD9_FS_MASK]; *val2 = kxsd9_micro_scales[ret & KXSD9_FS_MASK];
ret = IIO_VAL_INT_PLUS_MICRO; ret = IIO_VAL_INT_PLUS_MICRO;
break; break;