Merge branch 'i2c-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging

* 'i2c-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging:
  i2c/tsl2550: Fix lux value in dark environment

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;