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| author | Gabriele Mazzotta <gabriele.mzt@gmail.com> | 2016-01-12 16:21:39 +0100 |
|---|---|---|
| committer | Jonathan Cameron <jic23@kernel.org> | 2016-01-16 13:58:18 +0100 |
| commit | fa34e6dd44d7c02c8a8468ce4a52a7506f907bef (patch) | |
| tree | cee9051c98478c489d8dbb198bc36322800aa859 | |
| parent | iio: dac: mcp4725: set iio name property in sysfs (diff) | |
| download | linux-fa34e6dd44d7c02c8a8468ce4a52a7506f907bef.tar.xz linux-fa34e6dd44d7c02c8a8468ce4a52a7506f907bef.zip | |
iio: light: acpi-als: Report data as processed
As per the ACPI specification (Revision 5.0) [1], the data coming
from the sensor represent the ambient light illuminance reading
expressed in lux. So use IIO_CHAN_INFO_PROCESSED to signify that
the data are pre-processed.
However, to keep backward ABI compatibility, the IIO_CHAN_INFO_RAW
bit is not removed.
[1] http://www.acpi.info/DOWNLOADS/ACPIspec50.pdf
This issue has also been responsible for at least one userspace bug
report hence marking what is a small semantic fix really for stable.
[2] https://github.com/hadess/iio-sensor-proxy/issues/46
Signed-off-by: Gabriele Mazzotta <gabriele.mzt@gmail.com>
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
| -rw-r--r-- | drivers/iio/light/acpi-als.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/iio/light/acpi-als.c b/drivers/iio/light/acpi-als.c index 60537ec0c923..53201d99a16c 100644 --- a/drivers/iio/light/acpi-als.c +++ b/drivers/iio/light/acpi-als.c @@ -54,7 +54,9 @@ static const struct iio_chan_spec acpi_als_channels[] = { .realbits = 32, .storagebits = 32, }, - .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), + /* _RAW is here for backward ABI compatibility */ + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | + BIT(IIO_CHAN_INFO_PROCESSED), }, }; @@ -152,7 +154,7 @@ static int acpi_als_read_raw(struct iio_dev *indio_dev, s32 temp_val; int ret; - if (mask != IIO_CHAN_INFO_RAW) + if ((mask != IIO_CHAN_INFO_PROCESSED) && (mask != IIO_CHAN_INFO_RAW)) return -EINVAL; /* we support only illumination (_ALI) so far. */ |