From c08ae18560aaed50fed306a2e11f36ce70130f65 Mon Sep 17 00:00:00 2001 From: Markus Elfring Date: Sat, 19 Dec 2015 14:14:54 +0100 Subject: iio-light: Use a signed return type for ltr501_match_samp_freq() The return type "unsigned int" was used by the ltr501_match_samp_freq() function despite of the aspect that it will eventually return a negative error code. Improve this implementation detail by deletion of the type modifier then. This issue was detected by using the Coccinelle software. Signed-off-by: Markus Elfring Acked-by: Peter Meerwald-Stadler Cc: Signed-off-by: Jonathan Cameron --- drivers/iio/light/ltr501.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/iio/light') diff --git a/drivers/iio/light/ltr501.c b/drivers/iio/light/ltr501.c index 809a961b9a7f..6bf89d8f3741 100644 --- a/drivers/iio/light/ltr501.c +++ b/drivers/iio/light/ltr501.c @@ -180,7 +180,7 @@ static const struct ltr501_samp_table ltr501_ps_samp_table[] = { {500000, 2000000} }; -static unsigned int ltr501_match_samp_freq(const struct ltr501_samp_table *tab, +static int ltr501_match_samp_freq(const struct ltr501_samp_table *tab, int len, int val, int val2) { int i, freq; -- cgit v1.2.3 From fa34e6dd44d7c02c8a8468ce4a52a7506f907bef Mon Sep 17 00:00:00 2001 From: Gabriele Mazzotta Date: Tue, 12 Jan 2016 16:21:39 +0100 Subject: 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 Cc: Signed-off-by: Jonathan Cameron --- drivers/iio/light/acpi-als.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) (limited to 'drivers/iio/light') 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. */ -- cgit v1.2.3