Re: [PATCH 06/13] arm64: dts: qcom: SC7280: Add rpmhcc clock controller node

[Taniya Das]

Hello Stephen,

Thanks for the review.

On 2/23/2021 1:13 PM, Stephen Boyd wrote:
> Quoting Rajendra Nayak (2021-02-11 23:28:43)
> > diff --git a/arch/arm64/boot/dts/qcom/sc7280.dtsi b/arch/arm64/boot/dts/qcom/sc7280.dtsi
> > index 7848e88..10851e7 100644
> > --- a/arch/arm64/boot/dts/qcom/sc7280.dtsi
> > +++ b/arch/arm64/boot/dts/qcom/sc7280.dtsi
> > @@ -6,6 +6,7 @@
> >    */
> >   
> >   #include <dt-bindings/clock/qcom,gcc-sc7280.h>
> > +#include <dt-bindings/clock/qcom,rpmh.h>
> >   #include <dt-bindings/interrupt-controller/arm-gic.h>
> >   #include <dt-bindings/soc/qcom,rpmh-rsc.h>
> >   
> > @@ -29,6 +30,42 @@
> >                          clock-frequency = <32000>;
> >                          #clock-cells = <0>;
> >                  };
> > +
> > +               pcie_0_pipe_clk: pcie-0-pipe-clk {
> > +                       compatible = "fixed-clock";
> > +                       clock-frequency = <1000>;
> > +                       #clock-cells = <0>;
> > +               };
> > +
> > +               pcie_1_pipe_clk: pcie-1-pipe-clk {
> > +                       compatible = "fixed-clock";
> > +                       clock-frequency = <1000>;
> > +                       #clock-cells = <0>;
> > +               };
> > +
> > +               ufs_phy_rx_symbol_0_clk: ufs-phy-rx-symbol-0-clk {
> > +                       compatible = "fixed-clock";
> > +                       clock-frequency = <1000>;
> > +                       #clock-cells = <0>;
> > +               };
> > +
> > +               ufs_phy_rx_symbol_1_clk: ufs-phy-rx-symbol-1-clk {
> > +                       compatible = "fixed-clock";
> > +                       clock-frequency = <1000>;
> > +                       #clock-cells = <0>;
> > +               };
> > +
> > +               ufs_phy_tx_symbol_0_clk: ufs-phy-tx-symbol-0-clk {
> > +                       compatible = "fixed-clock";
> > +                       clock-frequency = <1000>;
> > +                       #clock-cells = <0>;
> > +               };
> > +
> > +               usb3_phy_wrapper_gcc_usb30_pipe_clk: usb3-phy-wrapper-gcc-usb30-pipe-clk {
> > +                       compatible = "fixed-clock";
> > +                       clock-frequency = <1000>;
> > +                       #clock-cells = <0>;
> > +               };
>
> Shouldn't these come from the phys? Why are they being added here?

Once the phys are added, these could be replaced, that was the reason to 
add them.

> >          };
> >   
> >          reserved_memory: reserved-memory {
> > @@ -174,6 +211,17 @@
> >                  gcc: clock-controller@100000 {
> >                          compatible = "qcom,gcc-sc7280";
> >                          reg = <0 0x00100000 0 0x1f0000>;
> > +                       clocks = <&rpmhcc RPMH_CXO_CLK>,
> > +                                <&rpmhcc RPMH_CXO_CLK_A>, <&sleep_clk>,
> > +                                <&pcie_0_pipe_clk>, <&pcie_1_pipe_clk>,
> > +                                <&ufs_phy_rx_symbol_0_clk>, <&ufs_phy_rx_symbol_1_clk>,
> > +                                <&ufs_phy_tx_symbol_0_clk>,
> > +                                <&usb3_phy_wrapper_gcc_usb30_pipe_clk>;
>
> If the phys aren't ready then <0> should work. Unless something goes
> wrong?

Nothing would go wrong if we add <0>, but wanted them to be replaced 
once the support is added.


> > +                       clock-names = "bi_tcxo", "bi_tcxo_ao", "sleep_clk",
> > +                                     "pcie_0_pipe_clk", "pcie_1_pipe-clk",
> > +                                     "ufs_phy_rx_symbol_0_clk", "ufs_phy_rx_symbol_1_clk",
> > +                                     "ufs_phy_tx_symbol_0_clk",
> > +                                     "usb3_phy_wrapper_gcc_usb30_pipe_clk";
> >                          #clock-cells = <1>;
> >                          #reset-cells = <1>;
> >                          #power-domain-cells = <1>;
> > @@ -325,6 +373,13 @@
> >                                            <SLEEP_TCS   3>,
> >                                            <WAKE_TCS    3>,
> >                                            <CONTROL_TCS 1>;
> > +
> > +                       rpmhcc: qcom,rpmhcc {
>
> rpmhcc: clock-controller {

Will update in the next patch.

> > +                               compatible = "qcom,sc7280-rpmh-clk";
> > +                               clocks = <&xo_board>;
> > +                               clock-names = "xo";
> > +                               #clock-cells = <1>;
> > +                       };
> >                  };
> >          };

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