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| author | Bill Richardson <wfrichar@chromium.org> | 2015-01-15 17:01:45 -0800 |
|---|---|---|
| committer | ChromeOS Commit Bot <chromeos-commit-bot@chromium.org> | 2015-01-21 05:05:47 +0000 |
| commit | 43806f07e35de0ab9b27774e2f27841a78a2c527 (patch) | |
| tree | 3a117ae15a5810dd9e24a57722b33fa6c686ff97 /common/als.c | |
| parent | b1f0de7b37e2730836b056c1672739b123d403e6 (diff) | |
| download | chrome-ec-43806f07e35de0ab9b27774e2f27841a78a2c527.tar.gz | |
samus: Add scale factor to account for ALS attenuation
This adds a sensor-specific attentuation factor, which will be
applied to the ALS raw sensor readings on the EC. This is to
account for the attenutation due to glass, tinting, etc.
BUG=chrome-os-partner:34590
BRANCH=ToT,Samus
TEST=manual
In a root shell, run this:
cd /sys/bus/acpi/drivers/acpi_als/ACPI0008:00/iio:device1
while true; do cat in_illuminance_raw; sleep 1 ;done
Shine a flashlight on the ALS. Note that the readings are 5X
higher than they were before this CL.
Change-Id: I2a53872ecb5fab62e5f443d43588a26d3d7e697f
Signed-off-by: Bill Richardson <wfrichar@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/241191
Reviewed-by: Bryan Freed <bfreed@chromium.org>
Diffstat (limited to 'common/als.c')
| -rw-r--r-- | common/als.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/common/als.c b/common/als.c index 8c6ba9c5f1..e67eb03777 100644 --- a/common/als.c +++ b/common/als.c @@ -17,7 +17,8 @@ int als_read(enum als_id id, int *lux) { - return als[id].read(lux); + int af = als[id].attenuation_factor; + return als[id].read(lux, af); } void als_task(void) |