Hi! On Sun, Jun 25, 2017 at 11:45:42PM +0300, Priit Laes wrote: > SATA clock on sun4i/sun7i is of type (parent) / M / 6 where > 6 is fixed post-divider. > > Signed-off-by: Priit Laes <pl...@plaes.org> > --- > drivers/clk/sunxi-ng/ccu_div.c | 12 ++++++++++-- > drivers/clk/sunxi-ng/ccu_div.h | 3 ++- > 2 files changed, 12 insertions(+), 3 deletions(-) > > diff --git a/drivers/clk/sunxi-ng/ccu_div.c b/drivers/clk/sunxi-ng/ccu_div.c > index c0e5c10..de30e15 100644 > --- a/drivers/clk/sunxi-ng/ccu_div.c > +++ b/drivers/clk/sunxi-ng/ccu_div.c > @@ -62,8 +62,13 @@ static unsigned long ccu_div_recalc_rate(struct clk_hw *hw, > parent_rate = ccu_mux_helper_apply_prediv(&cd->common, &cd->mux, -1, > parent_rate); > > - return divider_recalc_rate(hw, parent_rate, val, cd->div.table, > - cd->div.flags); > + val = divider_recalc_rate(hw, parent_rate, val, cd->div.table, > + cd->div.flags); > + > + if (cd->common.features & CCU_FEATURE_FIXED_POSTDIV) > + val /= cd->fixed_post_div; > + > + return val; > } > > static int ccu_div_determine_rate(struct clk_hw *hw, > @@ -89,6 +94,9 @@ static int ccu_div_set_rate(struct clk_hw *hw, unsigned > long rate, > val = divider_get_val(rate, parent_rate, cd->div.table, cd->div.width, > cd->div.flags); > > + if (cd->common.features & CCU_FEATURE_FIXED_POSTDIV) > + val *= cd->fixed_post_div; > + > spin_lock_irqsave(cd->common.lock, flags); > > reg = readl(cd->common.base + cd->common.reg);
You also need to adjust the round rate call back to take into account
the post divider before calling divider_round_rate_parent, and after
since that function can modify the parent_rate.
> diff --git a/drivers/clk/sunxi-ng/ccu_div.h b/drivers/clk/sunxi-ng/ccu_div.h
> index 08d0744..f3a5028 100644
> --- a/drivers/clk/sunxi-ng/ccu_div.h
> +++ b/drivers/clk/sunxi-ng/ccu_div.h
> @@ -86,9 +86,10 @@ struct ccu_div_internal {
> struct ccu_div {
> u32 enable;
>
> - struct ccu_div_internal div;
> + struct ccu_div_internal div;
Spurious change?
Thanks!
Maxime
--
Maxime Ripard, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com
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