diff options
Diffstat (limited to 'drivers/iio')
| -rw-r--r-- | drivers/iio/light/tsl2563.c | 9 |
1 files changed, 3 insertions, 6 deletions
diff --git a/drivers/iio/light/tsl2563.c b/drivers/iio/light/tsl2563.c index 3b60d8000351..bdd40a5df53d 100644 --- a/drivers/iio/light/tsl2563.c +++ b/drivers/iio/light/tsl2563.c @@ -19,6 +19,7 @@ #include <linux/interrupt.h> #include <linux/irq.h> #include <linux/sched.h> +#include <linux/math.h> #include <linux/mutex.h> #include <linux/delay.h> #include <linux/pm.h> @@ -38,10 +39,6 @@ /* Bits used for fraction in calibration coefficients.*/ #define CALIB_FRAC_BITS 10 -/* 0.5 in CALIB_FRAC_BITS precision */ -#define CALIB_FRAC_HALF BIT(CALIB_FRAC_BITS - 1) -/* Make a fraction from a number n that was multiplied with b. */ -#define CALIB_FRAC(n, b) (((n) << CALIB_FRAC_BITS) / (b)) /* Decimal 10^(digits in sysfs presentation) */ #define CALIB_BASE_SYSFS 1000 @@ -360,12 +357,12 @@ out: static inline int tsl2563_calib_to_sysfs(u32 calib) { - return (int) (((calib * CALIB_BASE_SYSFS) + - CALIB_FRAC_HALF) >> CALIB_FRAC_BITS); + return (int)DIV_ROUND_CLOSEST(calib * CALIB_BASE_SYSFS, BIT(CALIB_FRAC_BITS)); } static inline u32 tsl2563_calib_from_sysfs(int value) { + /* Make a fraction from a number n that was multiplied with b. */ return (((u32) value) << CALIB_FRAC_BITS) / CALIB_BASE_SYSFS; } |