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| author | Narcisa Ana Maria Vasile <narcisaanamaria12@gmail.com> | 2017-12-06 18:57:58 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-02-03 17:39:23 +0100 |
| commit | 0db5de4f4e1884c0ceb246bbcf450fbfd01881f7 (patch) | |
| tree | 6b3c089ba2efb1801067632756694ce388571fb3 /lib/mpi/mpiutil.c | |
| parent | e2d4cdb7b8a4b2f8d4dfc2ae067229595ec0190c (diff) | |
iio: chemical: ccs811: Fix output of IIO_CONCENTRATION channels
commit 8f114acd4e1a9cfa05b70bcc4219bc88197b5c9b upstream.
in_concentration_raw should report, according to sysfs-bus-iio documentation,
a "Raw (unscaled no offset etc.) percentage reading of a substance."
Modify scale to convert from ppm/ppb to percentage:
1 ppm = 0.0001%
1 ppb = 0.0000001%
There is no offset needed to convert the ppm/ppb to percentage,
so remove offset from IIO_CONCENTRATION (IIO_MOD_CO2) channel.
Cc'd stable to reduce chance of userspace breakage in the long
run as we fix this wrong bit of ABI usage.
Signed-off-by: Narcisa Ana Maria Vasile <narcisaanamaria12@gmail.com>
Reviewed-by: Matt Ranostay <matt.ranostay@konsulko.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'lib/mpi/mpiutil.c')
0 files changed, 0 insertions, 0 deletions