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| author | Lars-Peter Clausen <lars@metafoo.de> | 2020-12-15 20:17:42 +0100 |
|---|---|---|
| committer | Jonathan Cameron <Jonathan.Cameron@huawei.com> | 2021-03-11 20:47:00 +0000 |
| commit | 38a52cdef5b3ba2e4ac6b24a073a231e04d2c552 (patch) | |
| tree | 89f1497b65c9db3f05553839c22b7b20f4cafc17 /drivers/iio/industrialio-core.c | |
| parent | 2646a95df94e5d2aaeb22fa912179831ebd0095b (diff) | |
| download | linux-stable-38a52cdef5b3ba2e4ac6b24a073a231e04d2c552.tar.gz linux-stable-38a52cdef5b3ba2e4ac6b24a073a231e04d2c552.tar.bz2 linux-stable-38a52cdef5b3ba2e4ac6b24a073a231e04d2c552.zip | |
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: Lars-Peter Clausen <lars@metafoo.de>
Link: https://lore.kernel.org/r/20201215191743.2725-2-lars@metafoo.de
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Diffstat (limited to 'drivers/iio/industrialio-core.c')
| -rw-r--r-- | drivers/iio/industrialio-core.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/iio/industrialio-core.c b/drivers/iio/industrialio-core.c index 023040ecd96f..1b40136f10ac 100644 --- a/drivers/iio/industrialio-core.c +++ b/drivers/iio/industrialio-core.c @@ -659,7 +659,10 @@ 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); - return scnprintf(buf, len, "%d.%09u", tmp0, abs(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: { int i; |