提交 ddb1d4ed 编写于 作者: L Linus Torvalds

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
...@@ -27,7 +27,7 @@ ...@@ -27,7 +27,7 @@
#include <linux/delay.h> #include <linux/delay.h>
#define TSL2550_DRV_NAME "tsl2550" #define TSL2550_DRV_NAME "tsl2550"
#define DRIVER_VERSION "1.1.1" #define DRIVER_VERSION "1.1.2"
/* /*
* Defines * Defines
...@@ -189,13 +189,16 @@ static int tsl2550_calculate_lux(u8 ch0, u8 ch1) ...@@ -189,13 +189,16 @@ static int tsl2550_calculate_lux(u8 ch0, u8 ch1)
u8 r = 128; u8 r = 128;
/* Avoid division by 0 and count 1 cannot be greater than count 0 */ /* Avoid division by 0 and count 1 cannot be greater than count 0 */
if (c0 && (c1 <= c0)) if (c1 <= c0)
r = c1 * 128 / c0; if (c0) {
r = c1 * 128 / c0;
/* Calculate LUX */
lux = ((c0 - c1) * ratio_lut[r]) / 256;
} else
lux = 0;
else else
return -1; return -EAGAIN;
/* Calculate LUX */
lux = ((c0 - c1) * ratio_lut[r]) / 256;
/* LUX range check */ /* LUX range check */
return lux > TSL2550_MAX_LUX ? TSL2550_MAX_LUX : lux; return lux > TSL2550_MAX_LUX ? TSL2550_MAX_LUX : lux;
......
Markdown is supported
0% .
You are about to add 0 people to the discussion. Proceed with caution.
先完成此消息的编辑!
想要评论请 注册