linux-kernel - Re: [PATCH 5/6] arm64: dts: qcom: ipq5018: Add PCIe related nodes

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Message-ID: <da76b7ad-3157-4dbe-8987-5a7796dd71dc@quicinc.com>
Date:   Tue, 3 Oct 2023 22:59:47 +0530
From:   Nitheesh Sekar <quic_nsekar@...cinc.com>
To:     Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
CC:     <agross@...nel.org>, <andersson@...nel.org>,
        <konrad.dybcio@...aro.org>, <lpieralisi@...nel.org>,
        <kw@...ux.com>, <robh@...nel.org>, <bhelgaas@...gle.com>,
        <krzysztof.kozlowski+dt@...aro.org>, <conor+dt@...nel.org>,
        <vkoul@...nel.org>, <kishon@...nel.org>, <mani@...nel.org>,
        <p.zabel@...gutronix.de>, <quic_srichara@...cinc.com>,
        <quic_varada@...cinc.com>, <quic_ipkumar@...cinc.com>,
        <linux-arm-msm@...r.kernel.org>, <linux-pci@...r.kernel.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-phy@...ts.infradead.org>
Subject: Re: [PATCH 5/6] arm64: dts: qcom: ipq5018: Add PCIe related nodes


On 10/3/2023 8:53 PM, Dmitry Baryshkov wrote:
> On Tue, 3 Oct 2023 at 15:10, Nitheesh Sekar <quic_nsekar@...cinc.com> wrote:
>> Add phy and controller nodes for PCIe_x2 and PCIe_x1.
>> PCIe_x2 is 2-lane Gen2 and PCIe_x1 is 1-lane Gen2.
>>
>> Signed-off-by: Nitheesh Sekar <quic_nsekar@...cinc.com>
>> ---
>>   arch/arm64/boot/dts/qcom/ipq5018.dtsi | 186 +++++++++++++++++++++++++-
>>   1 file changed, 184 insertions(+), 2 deletions(-)
>>
>> diff --git a/arch/arm64/boot/dts/qcom/ipq5018.dtsi b/arch/arm64/boot/dts/qcom/ipq5018.dtsi
>> index 38ffdc3cbdcd..0818fdd1e693 100644
>> --- a/arch/arm64/boot/dts/qcom/ipq5018.dtsi
>> +++ b/arch/arm64/boot/dts/qcom/ipq5018.dtsi
>> @@ -8,6 +8,7 @@
>>   #include <dt-bindings/interrupt-controller/arm-gic.h>
>>   #include <dt-bindings/clock/qcom,gcc-ipq5018.h>
>>   #include <dt-bindings/reset/qcom,gcc-ipq5018.h>
>> +#include <dt-bindings/gpio/gpio.h>
>>
>>   / {
>>          interrupt-parent = <&intc>;
>> @@ -94,6 +95,38 @@
>>                  #size-cells = <1>;
>>                  ranges = <0 0 0 0xffffffff>;
>>
>> +               pcie_x1phy: phy@...00{
>> +                       compatible = "qcom,ipq5018-uniphy-pcie-gen2x1";
>> +                       reg = <0x0007e000 0x800>;
>> +                       #phy-cells = <0>;
>> +                       #clock-cells = <0>;
>> +                       clocks = <&gcc GCC_PCIE1_PIPE_CLK>;
>> +                       clock-names = "pipe_clk";
>> +                       clock-output-names = "pcie1_pipe_clk";
>> +                       assigned-clocks = <&gcc GCC_PCIE1_PIPE_CLK>;
>> +                       assigned-clock-rates = <125000000>;
>> +                       resets = <&gcc GCC_PCIE1_PHY_BCR>,
>> +                                <&gcc GCC_PCIE1PHY_PHY_BCR>;
>> +                       reset-names = "phy", "phy_phy";
>> +                       status = "disabled";
>> +               };
>> +
>> +               pcie_x2phy: phy@...00{
>> +                       compatible = "qcom,ipq5018-uniphy-pcie-gen2x2";
>> +                       reg = <0x00086000 0x800>;
>> +                       #phy-cells = <0>;
>> +                       #clock-cells = <0>;
>> +                       clocks = <&gcc GCC_PCIE0_PIPE_CLK>;
>> +                       clock-names = "pipe_clk";
>> +                       clock-output-names = "pcie0_pipe_clk";
>> +                       assigned-clocks = <&gcc GCC_PCIE0_PIPE_CLK>;
>> +                       assigned-clock-rates = <125000000>;
> Can this go into the PHY driver?
Sure. Will check and update.
>
>> +                       resets = <&gcc GCC_PCIE0_PHY_BCR>,
>> +                                <&gcc GCC_PCIE0PHY_PHY_BCR>;
>> +                       reset-names = "phy", "phy_phy";
>> +                       status = "disabled";
>> +               };
>> +
>>                  tlmm: pinctrl@...0000 {
>>                          compatible = "qcom,ipq5018-tlmm";
>>                          reg = <0x01000000 0x300000>;
>> @@ -117,8 +150,8 @@
>>                          reg = <0x01800000 0x80000>;
>>                          clocks = <&xo_board_clk>,
>>                                   <&sleep_clk>,
>> -                                <0>,
>> -                                <0>,
>> +                                <&pcie_x2phy>,
>> +                                <&pcie_x1phy>,
>>                                   <0>,
>>                                   <0>,
>>                                   <0>,
>> @@ -246,6 +279,155 @@
>>                                  status = "disabled";
>>                          };
>>                  };
>> +
>> +               pcie_x1: pci@...00000 {
>> +                       compatible = "qcom,pcie-ipq5018";
>> +                       reg =  <0x80000000 0xf1d
> Each address/size tuple should be a separate <> entry.
Sure. will update it.
>
>> +                               0x80000F20 0xa8
> lowercase
Sure. Will update.
>
>> +                               0x80001000 0x1000
>> +                               0x78000 0x3000
> Would you notice why this line stands away from the rest of entries here?

Sure. Will pad it Zeros.

Thanks,
Nitheesh