linux-kernel - Re: [PATCH v4 08/16] clk: qcom: gcc-ipq806x: add additional freq nss cores

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Date:   Thu, 24 Feb 2022 16:55:17 +0100
From:   Ansuel Smith <ansuelsmth@...il.com>
To:     Bjorn Andersson <bjorn.andersson@...aro.org>
Cc:     Andy Gross <agross@...nel.org>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        Taniya Das <tdas@...eaurora.org>,
        linux-arm-msm@...r.kernel.org, linux-clk@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 08/16] clk: qcom: gcc-ipq806x: add additional freq nss
 cores

On Wed, Feb 23, 2022 at 09:55:16PM -0600, Bjorn Andersson wrote:
> On Thu 17 Feb 17:56 CST 2022, Ansuel Smith wrote:
> 
> > Ipq8065 SoC (an evolution of ipq8064 SoC) contains nss cores that can be
> > clocked to 800MHz. Add these missing freq to the gcc driver.
> > 
> 
> Do we somehow need to ensure that these new frequencies are only
> available on 8065?
> 
> Regards,
> Bjorn
>

In theory ipq8064 can run the nss cores to this freq. Do you have any
suggestion on how to limit these 2 clock to the different compatible?

> > Signed-off-by: Ansuel Smith <ansuelsmth@...il.com>
> > ---
> >  drivers/clk/qcom/gcc-ipq806x.c | 4 ++++
> >  1 file changed, 4 insertions(+)
> > 
> > diff --git a/drivers/clk/qcom/gcc-ipq806x.c b/drivers/clk/qcom/gcc-ipq806x.c
> > index a4bf78fe8678..53a61860063d 100644
> > --- a/drivers/clk/qcom/gcc-ipq806x.c
> > +++ b/drivers/clk/qcom/gcc-ipq806x.c
> > @@ -232,7 +232,9 @@ static struct clk_regmap pll14_vote = {
> >  
> >  static struct pll_freq_tbl pll18_freq_tbl[] = {
> >  	NSS_PLL_RATE(550000000, 44, 0, 1, 0x01495625),
> > +	NSS_PLL_RATE(600000000, 48, 0, 1, 0x01495625),
> >  	NSS_PLL_RATE(733000000, 58, 16, 25, 0x014b5625),
> > +	NSS_PLL_RATE(800000000, 64, 0, 1, 0x01495625),
> >  };
> >  
> >  static struct clk_pll pll18 = {
> > @@ -2702,7 +2704,9 @@ static const struct freq_tbl clk_tbl_nss[] = {
> >  	{ 110000000, P_PLL18, 1, 1, 5 },
> >  	{ 275000000, P_PLL18, 2, 0, 0 },
> >  	{ 550000000, P_PLL18, 1, 0, 0 },
> > +	{ 600000000, P_PLL18, 1, 0, 0 },
> >  	{ 733000000, P_PLL18, 1, 0, 0 },
> > +	{ 800000000, P_PLL18, 1, 0, 0 },
> >  	{ }
> >  };
> >  
> > -- 
> > 2.34.1
> > 

-- 
	Ansuel