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authorRafael J. Wysocki <rjw@sisk.pl>2009-07-29 22:28:08 +0400
committerRafael J. Wysocki <rjw@sisk.pl>2009-07-29 22:28:08 +0400
commitb4093d6235b7e4249616651ee328600ced48a18a (patch)
tree9f5b8e466e2d26fbe13ee7934f9e939a09815bd5 /drivers/i2c
parentd9ab77161d811ffb0bccf396f7155cc905c1b9e1 (diff)
parent7d3e91b8a1f5179d56a7412d4b499f2d5fc6b25d (diff)
downloadlinux-b4093d6235b7e4249616651ee328600ced48a18a.tar.xz
Merge branch 'master' into for-linus
Diffstat (limited to 'drivers/i2c')
-rw-r--r--drivers/i2c/chips/tsl2550.c17
1 files changed, 10 insertions, 7 deletions
diff --git a/drivers/i2c/chips/tsl2550.c b/drivers/i2c/chips/tsl2550.c
index 1a9cc135219f..b96f3025e588 100644
--- a/drivers/i2c/chips/tsl2550.c
+++ b/drivers/i2c/chips/tsl2550.c
@@ -27,7 +27,7 @@
#include <linux/delay.h>
#define TSL2550_DRV_NAME "tsl2550"
-#define DRIVER_VERSION "1.1.1"
+#define DRIVER_VERSION "1.1.2"
/*
* Defines
@@ -189,13 +189,16 @@ static int tsl2550_calculate_lux(u8 ch0, u8 ch1)
u8 r = 128;
/* Avoid division by 0 and count 1 cannot be greater than count 0 */
- if (c0 && (c1 <= c0))
- r = c1 * 128 / c0;
+ if (c1 <= c0)
+ if (c0) {
+ r = c1 * 128 / c0;
+
+ /* Calculate LUX */
+ lux = ((c0 - c1) * ratio_lut[r]) / 256;
+ } else
+ lux = 0;
else
- return -1;
-
- /* Calculate LUX */
- lux = ((c0 - c1) * ratio_lut[r]) / 256;
+ return -EAGAIN;
/* LUX range check */
return lux > TSL2550_MAX_LUX ? TSL2550_MAX_LUX : lux;