On Tue, Sep 25, 2018 at 01:42:12PM -0300, Fabio Estevam wrote:
> Hi Abel,
>
> On Mon, Sep 24, 2018 at 7:39 AM, Abel Vesa <abel.v...@nxp.com> wrote:
>
> > +static long imx_clk_composite_divider_round_rate(struct clk_hw *hw,
> > + unsigned long rate,
> > + unsigned long *prate)
> > +{
> > + int prediv_value;
> > + int div_value;
> > +
> > + imx_clk_composite_compute_dividers(rate, *prate,
> > + &prediv_value, &div_value);
> > +
> > + rate = DIV_ROUND_UP_ULL((u64)*prate, prediv_value);
>
> You assing a value to 'rate' here.
>
> > + rate = DIV_ROUND_UP_ULL((u64)rate, div_value);
>
> And then overwrite it immediately after.
It's:
rate = *prate / prediv_value;
rate = rate / div_value;
To me this looks correct. However, For an unsigned long type we have
DIV_ROUND_UP() with which we do not need any casting. For 64bit code
unsigned long is 64bit anyway which makes the cast a no-op and for 32bit
code there's also no point in exanding the initial 32bit value to 64bit.
Sascha
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