linux-kernel - Re: [PATCH v2 07/10] arm64: dts: qcom: Add support for GCC and RPMHCC for SDX75

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Date:   Mon, 5 Jun 2023 21:30:34 +0300
From:   Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To:     Rohit Agarwal <quic_rohiagar@...cinc.com>
Cc:     agross@...nel.org, andersson@...nel.org, konrad.dybcio@...aro.org,
        robh+dt@...nel.org, krzysztof.kozlowski+dt@...aro.org,
        conor+dt@...nel.org, rafael@...nel.org, viresh.kumar@...aro.org,
        tglx@...utronix.de, maz@...nel.org, will@...nel.org,
        robin.murphy@....com, joro@...tes.org, mani@...nel.org,
        robimarko@...il.com, linux-arm-msm@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-pm@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        iommu@...ts.linux.dev, Imran Shaik <quic_imrashai@...cinc.com>
Subject: Re: [PATCH v2 07/10] arm64: dts: qcom: Add support for GCC and RPMHCC
 for SDX75

On Mon, 5 Jun 2023 at 19:30, Rohit Agarwal <quic_rohiagar@...cinc.com> wrote:
>
> From: Imran Shaik <quic_imrashai@...cinc.com>
>
> Add support for GCC and RPMHCC clock nodes for SDX75 platform.
>
> Signed-off-by: Imran Shaik <quic_imrashai@...cinc.com>
> Signed-off-by: Rohit Agarwal <quic_rohiagar@...cinc.com>
> ---
>  arch/arm64/boot/dts/qcom/sdx75.dtsi | 37 ++++++++++++++++++++++++++++++++++++-
>  1 file changed, 36 insertions(+), 1 deletion(-)
>
> diff --git a/arch/arm64/boot/dts/qcom/sdx75.dtsi b/arch/arm64/boot/dts/qcom/sdx75.dtsi
> index 3d1646b..f83eef8 100644
> --- a/arch/arm64/boot/dts/qcom/sdx75.dtsi
> +++ b/arch/arm64/boot/dts/qcom/sdx75.dtsi
> @@ -7,6 +7,7 @@
>   */
>
>  #include <dt-bindings/clock/qcom,rpmh.h>
> +#include <dt-bindings/clock/qcom,sdx75-gcc.h>
>  #include <dt-bindings/interrupt-controller/arm-gic.h>
>  #include <dt-bindings/soc/qcom,rpmh-rsc.h>
>
> @@ -22,7 +23,21 @@
>                 reg = <0 0x80000000 0 0>;
>         };
>
> -       clocks { };
> +       clocks {
> +               xo_board: xo_board {

No underscores in node names

> +                       compatible = "fixed-clock";
> +                       clock-frequency = <76800000>;
> +                       clock-output-names = "xo_board";

Why do you need this?

> +                       #clock-cells = <0>;
> +               };
> +
> +               sleep_clk: sleep_clk {

No underscores in node names

> +                       compatible = "fixed-clock";
> +                       clock-frequency = <32000>;
> +                       clock-output-names = "sleep_clk";

Why do you need this?

> +                       #clock-cells = <0>;
> +               };
> +       };
>
>         cpus {
>                 #address-cells = <2>;
> @@ -358,6 +373,18 @@
>                 ranges = <0 0 0 0 0x10 0>;
>                 dma-ranges = <0 0 0 0 0x10 0>;
>
> +               gcc: clock-controller@...00 {
> +                       compatible = "qcom,sdx75-gcc";
> +                       reg = <0x0 0x0080000 0x0 0x1f7400>;
> +                       clocks = <&rpmhcc RPMH_CXO_CLK>,
> +                                <&sleep_clk>;
> +                       clock-names = "bi_tcxo",
> +                                     "sleep_clk";

As this is a new platform, it should not be using clock-names to bind
gcc clocks. Please use clock indices instead.

> +                       #clock-cells = <1>;
> +                       #reset-cells = <1>;
> +                       #power-domain-cells = <1>;
> +               };
> +
>                 tcsr_mutex: hwlock@...0000 {
>                         compatible = "qcom,tcsr-mutex";
>                         reg = <0x0 0x01f40000 0x0 0x40000>;
> @@ -520,6 +547,14 @@
>                         apps_bcm_voter: bcm_voter {
>                                 compatible = "qcom,bcm-voter";
>                         };
> +
> +                       rpmhcc: clock-controller {
> +                               compatible = "qcom,sdx75-rpmh-clk";
> +                               clocks = <&xo_board>;

> +                               clock-names = "xo";
> +                               #clock-cells = <1>;
> +                       };
> +
>                 };
>         };
>
> --
> 2.7.4
>


-- 
With best wishes
Dmitry