On Tue, Jun 17, 2014 at 9:52 AM, Chen-Yu Tsai <w...@csie.org> wrote: > The PLLs on newer Allwinner SoC's, such as the A31 and A23, have a > N multiplier factor that starts from 1, not 0. > > This patch adds an option to the clock driver's config data structures > to define the difference. > > Signed-off-by: Chen-Yu Tsai <w...@csie.org> > Acked-by: Maxime Ripard <maxime.rip...@free-electrons.com> > --- > drivers/clk/sunxi/clk-factors.c | 5 ++++- > drivers/clk/sunxi/clk-factors.h | 1 + > 2 files changed, 5 insertions(+), 1 deletion(-) > > diff --git a/drivers/clk/sunxi/clk-factors.c b/drivers/clk/sunxi/clk-factors.c > index 3806d97..399cf4d 100644 > --- a/drivers/clk/sunxi/clk-factors.c > +++ b/drivers/clk/sunxi/clk-factors.c > @@ -62,7 +62,10 @@ static unsigned long clk_factors_recalc_rate(struct clk_hw > *hw, > p = FACTOR_GET(config->pshift, config->pwidth, reg); > > /* Calculate the rate */ > - rate = (parent_rate * n * (k + 1) >> p) / (m + 1); > + if (config->n_from_one) > + rate = (parent_rate * (n + 1) * (k + 1) >> p) / (m + 1); > + else > + rate = (parent_rate * n * (k + 1) >> p) / (m + 1);
This can be simplified and support any base with: rate = (parent_rate * (n + config->n_base) * (k + 1) >> p) / (m + 1); -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
