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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>
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1 changed files with 4 additions and 2 deletions
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@ -54,7 +54,9 @@ static const struct iio_chan_spec acpi_als_channels[] = {
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.realbits = 32,
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.storagebits = 32,
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},
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.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
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/* _RAW is here for backward ABI compatibility */
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.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
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BIT(IIO_CHAN_INFO_PROCESSED),
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},
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};
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@ -152,7 +154,7 @@ static int acpi_als_read_raw(struct iio_dev *indio_dev,
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s32 temp_val;
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int ret;
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if (mask != IIO_CHAN_INFO_RAW)
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if ((mask != IIO_CHAN_INFO_PROCESSED) && (mask != IIO_CHAN_INFO_RAW))
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return -EINVAL;
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/* we support only illumination (_ALI) so far. */
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