Commit 38a52cde authored by Lars-Peter Clausen's avatar Lars-Peter Clausen Committed by Jonathan Cameron
Browse files

iio: iio_format_value(): Fix IIO_VAL_FRACTIONAL_LOG2 values between -1.0 and 0.0 



When formatting a value using IIO_VAL_FRACTIONAL_LOG2 and the values is
between -1 and 0 the sign is omitted.

We need the same trick as for IIO_VAL_FRACTIONAL to make sure this gets
formatted correctly.

Signed-off-by: default avatarLars-Peter Clausen <lars@metafoo.de>
Link: https://lore.kernel.org/r/20201215191743.2725-2-lars@metafoo.de


Signed-off-by: default avatarJonathan Cameron <Jonathan.Cameron@huawei.com>
parent 2646a95d

drivers/iio/industrialio-core.c

+4 −1
Original line number Diff line number Diff line
@@ -659,6 +659,9 @@ static ssize_t __iio_format_value(char *buf, size_t len, unsigned int type, 
	case IIO_VAL_FRACTIONAL_LOG2:

		tmp2 = shift_right((s64)vals[0] * 1000000000LL, vals[1]);

		tmp0 = (int)div_s64_rem(tmp2, 1000000000LL, &tmp1);

		if (tmp0 == 0 && tmp2 < 0)

			return snprintf(buf, len, "-0.%09u", abs(tmp1));

		else

			return scnprintf(buf, len, "%d.%09u", tmp0, abs(tmp1));

	case IIO_VAL_INT_MULTIPLE:

	{