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backlight: pwm_bl: Eliminate a 64/32 division
authorRasmus Villemoes <linux@rasmusvillemoes.dk>
Tue, 8 Oct 2019 12:03:25 +0000 (14:03 +0200)
committerLee Jones <lee.jones@linaro.org>
Mon, 14 Oct 2019 07:57:45 +0000 (08:57 +0100)
commite802cbafcbd250a88cbd4ea7f9afb9c0d4267c7a
tree8525dc7336331c6b582082c14d70eb705360e20ftree | snapshot
parentefdf690e159ab340486dd6d42f387bbb8f03a579commit | diff
backlight: pwm_bl: Eliminate a 64/32 division

lightness*1000 is nowhere near overflowing 32 bits, so we can just use
an ordinary 32/32 division, which is much cheaper than the 64/32 done
via do_div().

Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
drivers/video/backlight/pwm_bl.c diff | blob | history
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