diff options
| author | Matt Ranostay <matt.ranostay@konsulko.com> | 2018-06-08 23:58:15 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-10-03 17:01:41 -0700 |
| commit | 8d2b8ae4ad7b2bd385465d816c3e5966cdbff53a (patch) | |
| tree | 653102ad4c2918fe9887c159914833bc6eed2e9f /drivers/misc | |
| parent | 581048527071d09cbaa62943a44296b63a1799d1 (diff) | |
tsl2550: fix lux1_input error in low light
[ Upstream commit ce054546cc2c26891cefa2f284d90d93b52205de ]
ADC channel 0 photodiode detects both infrared + visible light,
but ADC channel 1 just detects infrared. However, the latter is a bit
more sensitive in that range so complete darkness or low light causes
a error condition in which the chan0 - chan1 is negative that
results in a -EAGAIN.
This patch changes the resulting lux1_input sysfs attribute message from
"Resource temporarily unavailable" to a user-grokable lux value of 0.
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Matt Ranostay <matt.ranostay@konsulko.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/misc')
| -rw-r--r-- | drivers/misc/tsl2550.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/misc/tsl2550.c b/drivers/misc/tsl2550.c index 87a13374fdc0..eb5761067310 100644 --- a/drivers/misc/tsl2550.c +++ b/drivers/misc/tsl2550.c @@ -177,7 +177,7 @@ static int tsl2550_calculate_lux(u8 ch0, u8 ch1) } else lux = 0; else - return -EAGAIN; + return 0; /* LUX range check */ return lux > TSL2550_MAX_LUX ? TSL2550_MAX_LUX : lux; |