linux-kernel - Re: [PATCH v8 3/4] clk: qcom: rpmh: Add support for SM8550 rpmh clocks

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Message-ID: <20230106165656.zseftsxay4c74v6e@builder.lan>
Date:   Fri, 6 Jan 2023 10:56:56 -0600
From:   Bjorn Andersson <andersson@...nel.org>
To:     Abel Vesa <abel.vesa@...aro.org>
Cc:     Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
        Andy Gross <agross@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        Mike Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        devicetree@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        linux-clk@...r.kernel.org
Subject: Re: [PATCH v8 3/4] clk: qcom: rpmh: Add support for SM8550 rpmh
 clocks

On Wed, Jan 04, 2023 at 02:45:04PM +0200, Abel Vesa wrote:
> On 23-01-04 12:46:55, Dmitry Baryshkov wrote:
> > On 04/01/2023 11:34, Abel Vesa wrote:
> > > Adds the RPMH clocks present in SM8550 SoC.
> > > 
> > > Signed-off-by: Abel Vesa <abel.vesa@...aro.org>
> > > Reviewed-by: Konrad Dybcio <konrad.dybcio@...aro.org>
> > > ---
> > >   drivers/clk/qcom/clk-rpmh.c | 36 ++++++++++++++++++++++++++++++++++++
> > >   1 file changed, 36 insertions(+)
> > 
> > I think the plan was to have the _PAD clock as a child node of the rpmcc. Is
> > it still the planned implementation?
> 
> Yes. Here is how the dts rpmhcc node will look like:
> 
>          rpmhcc: clock-controller {
>                  compatible = "qcom,sm8550-rpmh-clk";
>                  #clock-cells = <1>;
>                  clock-names = "xo";
>                  clocks = <&xo_board>;
> 
>                  bi_tcxo_div2: bi-tcxo-div2-clk {

Considering that the remainder of the clock exposed (except ipa clock)
by the rpmhcc provider represent clock signals coming out of the pmic;
and that this divider is not located in the aoss (rsc), I don't think
these nodes should live here.

/clocks seems perfectly fine to me.

Regards,
Bjorn

>                          #clock-cells = <0>;
>                          compatible = "fixed-factor-clock";
>                          clocks = <&rpmhcc RPMH_CXO_CLK>;
>                          clock-mult = <1>;
>                          clock-div = <2>;
>                  };
> 
>                  bi_tcxo_ao_div2: bi-tcxo-div2-ao-clk {
>                          #clock-cells = <0>;
>                          compatible = "fixed-factor-clock";
>                          clocks = <&rpmhcc RPMH_CXO_CLK_A>;
>                          clock-mult = <1>;
>                          clock-div = <2>;
>                  };
>          };
> 
> The clock nodes will be probed on of_clk_init.
> 
> > 
> > -- 
> > With best wishes
> > Dmitry
> >