Re: [PATCH v3 4/7] clk: qcom: ipq4019: Added all the frequencies for apps cpu

[Abhishek Sahu <absahu@xxxxxxxxxxxxxx>]

On 2016-11-02 06:54, Stephen Boyd wrote:
> On 09/21, Abhishek Sahu wrote:
> > The APPS CPU clock does not contain all the frequencies in its
> > frequency table so this patch adds the same.
> >
> > Signed-off-by: Abhishek Sahu <absahu@xxxxxxxxxxxxxx>
> > ---
> >  drivers/clk/qcom/gcc-ipq4019.c | 12 +++++++++++-
> >  1 file changed, 11 insertions(+), 1 deletion(-)
> >
> > diff --git a/drivers/clk/qcom/gcc-ipq4019.c 
> > b/drivers/clk/qcom/gcc-ipq4019.c
> > index 211c68c..160e0cf 100644
> > --- a/drivers/clk/qcom/gcc-ipq4019.c
> > +++ b/drivers/clk/qcom/gcc-ipq4019.c
> > @@ -565,10 +565,20 @@ static struct clk_rcg2  sdcc1_apps_clk_src = {
> >  };
> >
> >  static const struct freq_tbl ftbl_gcc_apps_clk[] = {
> > -	F(48000000, P_XO,	   1, 0, 0),
> > +	F(48000000,  P_XO,         1, 0, 0),
> >  	F(200000000, P_FEPLL200,   1, 0, 0),
> > +	F(380000000, P_DDRPLLAPSS, 1, 0, 0),
> > +	F(409000000, P_DDRPLLAPSS, 1, 0, 0),
> > +	F(444000000, P_DDRPLLAPSS, 1, 0, 0),
> > +	F(484000000, P_DDRPLLAPSS, 1, 0, 0),
> >  	F(500000000, P_FEPLL500,   1, 0, 0),
> > +	F(507000000, P_DDRPLLAPSS, 1, 0, 0),
> > +	F(532000000, P_DDRPLLAPSS, 1, 0, 0),
> > +	F(560000000, P_DDRPLLAPSS, 1, 0, 0),
> > +	F(592000000, P_DDRPLLAPSS, 1, 0, 0),
> >  	F(626000000, P_DDRPLLAPSS, 1, 0, 0),
> > +	F(666000000, P_DDRPLLAPSS, 1, 0, 0),
> > +	F(710000000, P_DDRPLLAPSS, 1, 0, 0),
> >  	{ }
> >  };
>
> Can't we have the determine_rate callback know the speeds of the
> "fixed" PLLs and use those first if the rate hits exactly? And
> then if that doesn't happen go try ddrpllapps and set the rate on
> it? I'm hoping we can get rid of this frequency table.
This clock is being registered with QCOM clk_rcg2 operations which
already has determine_rate callback based on this frequency table.
Currently all the frequencies are being generated without HID
divider but in future, we can have some frequency which will use
dividers also.
--
Abhishek Sahu
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