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| author | Andy Shevchenko <andriy.shevchenko@linux.intel.com> | 2019-05-14 15:43:08 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2019-05-14 19:52:49 -0700 |
| commit | 9f6158946987a5ce3f16da097d18f240a89db417 (patch) | |
| tree | c232e7df2397d4186b39a1a4de9bb2534a60170f /drivers/video/backlight | |
| parent | 2c64e9cb0b6b858901e9a386860d7d929d1cbaeb (diff) | |
| download | linux-9f6158946987a5ce3f16da097d18f240a89db417.tar.gz linux-9f6158946987a5ce3f16da097d18f240a89db417.tar.bz2 linux-9f6158946987a5ce3f16da097d18f240a89db417.zip | |
lib/math: move int_pow() from pwm_bl.c for wider use
The integer exponentiation is used in few places and might be used in
the future by other call sites. Move it to wider use.
Link: http://lkml.kernel.org/r/20190323172531.80025-2-andriy.shevchenko@linux.intel.com
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Daniel Thompson <daniel.thompson@linaro.org>
Cc: Lee Jones <lee.jones@linaro.org>
Cc: Ray Jui <rjui@broadcom.com>
Cc: Thierry Reding <thierry.reding@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/video/backlight')
| -rw-r--r-- | drivers/video/backlight/pwm_bl.c | 15 |
1 files changed, 0 insertions, 15 deletions
diff --git a/drivers/video/backlight/pwm_bl.c b/drivers/video/backlight/pwm_bl.c index 53b8ceea9bde..fb45f866b923 100644 --- a/drivers/video/backlight/pwm_bl.c +++ b/drivers/video/backlight/pwm_bl.c @@ -155,21 +155,6 @@ static const struct backlight_ops pwm_backlight_ops = { #ifdef CONFIG_OF #define PWM_LUMINANCE_SCALE 10000 /* luminance scale */ -/* An integer based power function */ -static u64 int_pow(u64 base, int exp) -{ - u64 result = 1; - - while (exp) { - if (exp & 1) - result *= base; - exp >>= 1; - base *= base; - } - - return result; -} - /* * CIE lightness to PWM conversion. * |