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authorMatt Ranostay <matt.ranostay@konsulko.com>2018-06-09 09:58:15 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2018-07-07 18:44:52 +0300
commitce054546cc2c26891cefa2f284d90d93b52205de (patch)
treec1bed972eaf4f9b1bca1df6861aecddf761fcda1 /drivers/misc/tsl2550.c
parent6051e79bbfa6111c3a56a86fa8c6ff9a248e30a6 (diff)
downloadlinux-ce054546cc2c26891cefa2f284d90d93b52205de.tar.xz
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>
Diffstat (limited to 'drivers/misc/tsl2550.c')
-rw-r--r--drivers/misc/tsl2550.c2
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;