Commit 307fe9dd authored Sep 01, 2016 by Linus Walleij Committed by Jonathan Cameron Sep 03, 2016

iio: accel: kxsd9: Fix scaling bug



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>

parent 1c500840

drivers/iio/accel/kxsd9.c

+1 −0

Original line number	Original line	Diff line number	Diff line
	@@ -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;