On Tue, 2012-12-18 at 16:30 -0800, Andrew Morton wrote:
> On Wed, 28 Nov 2012 15:50:57 +0900
> Jonghwa Lee <[email protected]> wrote:
>
> > Add driver for support max77686 rtc.
> > MAX77686 rtc support smpl and wtsr mode. It has two alarm register
> > which can be used for alarming to wake system up. This drvier uses regmap
> > to access its register.
> >
> > ...
> >
> > +static inline int max77686_rtc_calculate_wday(u8 shifted)
> > +{
> > + int counter = -1;
> > + while (shifted) {
> > + shifted >>= 1;
> > + counter++;
> > + }
> > + return counter;
> > +}
>
> We should be able to use log2() in here?
fls(shifted) - 1
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