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| author | Matt Ranostay <matt.ranostay@konsulko.com> | 2018-06-08 23:58:15 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-07-07 17:44:52 +0200 |
| commit | ce054546cc2c26891cefa2f284d90d93b52205de (patch) | |
| tree | c1bed972eaf4f9b1bca1df6861aecddf761fcda1 | |
| parent | 6051e79bbfa6111c3a56a86fa8c6ff9a248e30a6 (diff) | |
| download | linux-ce054546cc2c26891cefa2f284d90d93b52205de.tar.gz linux-ce054546cc2c26891cefa2f284d90d93b52205de.tar.bz2 linux-ce054546cc2c26891cefa2f284d90d93b52205de.zip | |
tsl2550: fix lux1_input error in low light
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>
| -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 adf46072cb37..3fce3b6a3624 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; |