linux-kernel - Re: [PATCH V2 1/2] dt-bindings: phy: qcom,qmp-pcie: Add ipq9574 bindings

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Date:   Wed, 24 May 2023 11:19:08 +0530
From:   Devi Priya <quic_devipriy@...cinc.com>
To:     Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
        <agross@...nel.org>, <andersson@...nel.org>,
        <konrad.dybcio@...aro.org>, <vkoul@...nel.org>,
        <kishon@...nel.org>, <robh+dt@...nel.org>,
        <krzysztof.kozlowski+dt@...aro.org>, <conor+dt@...nel.org>,
        <linux-arm-msm@...r.kernel.org>, <linux-phy@...ts.infradead.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>
CC:     <quic_srichara@...cinc.com>, <quic_sjaganat@...cinc.com>,
        <quic_kathirav@...cinc.com>, <quic_arajkuma@...cinc.com>,
        <quic_anusha@...cinc.com>, <quic_ipkumar@...cinc.com>
Subject: Re: [PATCH V2 1/2] dt-bindings: phy: qcom,qmp-pcie: Add ipq9574
 bindings



On 5/22/2023 2:27 AM, Dmitry Baryshkov wrote:
> On 19/05/2023 11:57, Devi Priya wrote:
>> Add bindings for the PCIe QMP PHYs found on IPQ9574.
>>
>> Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
>> Signed-off-by: Devi Priya <quic_devipriy@...cinc.com>
>> ---
>>   Changes in V2:
>>     - Picked up the R-b tag
>>     - Did not convert the clock IDs to numerical values as the clock
>>       header (dependent patch) is merged in latest rc1.
>>
>>   .../phy/qcom,ipq9574-qmp-pcie-phy.yaml        | 90 +++++++++++++++++++
>>   1 file changed, 90 insertions(+)
>>   create mode 100644 
>> Documentation/devicetree/bindings/phy/qcom,ipq9574-qmp-pcie-phy.yaml
>>
>> diff --git 
>> a/Documentation/devicetree/bindings/phy/qcom,ipq9574-qmp-pcie-phy.yaml 
>> b/Documentation/devicetree/bindings/phy/qcom,ipq9574-qmp-pcie-phy.yaml
>> new file mode 100644
>> index 000000000000..7c8012647051
>> --- /dev/null
>> +++ 
>> b/Documentation/devicetree/bindings/phy/qcom,ipq9574-qmp-pcie-phy.yaml
>> @@ -0,0 +1,90 @@
>> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
>> +%YAML 1.2
>> +---
>> +$id: http://devicetree.org/schemas/phy/qcom,ipq9574-qmp-pcie-phy.yaml#
>> +$schema: http://devicetree.org/meta-schemas/core.yaml#
>> +
>> +title: Qualcomm QMP PHY controller (PCIe, IPQ9574)
>> +
>> +maintainers:
>> +  - Vinod Koul <vkoul@...nel.org>
>> +
>> +description:
>> +  The QMP PHY controller supports physical layer functionality for a 
>> number of
>> +  controllers on Qualcomm chipsets, such as, PCIe, UFS, and USB.
>> +
>> +properties:
>> +  compatible:
>> +    enum:
>> +      - qcom,ipq9574-qmp-gen3x1-pcie-phy
>> +      - qcom,ipq9574-qmp-gen3x2-pcie-phy
>> +
>> +  reg:
>> +    maxItems: 1
>> +
>> +  clocks:
>> +    maxItems: 5
>> +
>> +  clock-names:
>> +    items:
>> +      - const: aux
>> +      - const: cfg_ahb
>> +      - const: anoc_lane
>> +      - const: snoc_lane
>> +      - const: pipe
> 
> Could you please reorder the clocks in the following way:
> - aux
> - cfg_ahb
> - pipe
> - .. the rest
> 
> This will allow us to use this schema for other IPQ QMP PCIe PHYs.
Sure, will update.

Thanks,
Devi Priya
> 
>> +
>> +  resets:
>> +    maxItems: 2
>> +
>> +  reset-names:
>> +    items:
>> +      - const: phy
>> +      - const: common
>> +
>> +  "#clock-cells":
>> +    const: 0
>> +
>> +  clock-output-names:
>> +    maxItems: 1
>> +
>> +  "#phy-cells":
>> +    const: 0
>> +
>> +required:
>> +  - compatible
>> +  - reg
>> +  - clocks
>> +  - clock-names
>> +  - resets
>> +  - reset-names
>> +  - "#clock-cells"
>> +  - clock-output-names
>> +  - "#phy-cells"
>> +
>> +additionalProperties: false
>> +
>> +examples:
>> +  - |
>> +    #include <dt-bindings/clock/qcom,ipq9574-gcc.h>
>> +    #include <dt-bindings/reset/qcom,ipq9574-gcc.h>
>> +
>> +    pcie0_phy: phy@...00 {
>> +      compatible = "qcom,ipq9574-qmp-gen3x1-pcie-phy";
>> +      reg = <0x00084000 0x1000>;
>> +
>> +      clocks = <&gcc GCC_PCIE0_AUX_CLK>,
>> +               <&gcc GCC_PCIE0_AHB_CLK>,
>> +               <&gcc GCC_ANOC_PCIE0_1LANE_M_CLK>,
>> +               <&gcc GCC_SNOC_PCIE0_1LANE_S_CLK>,
>> +               <&gcc GCC_PCIE0_PIPE_CLK>;
>> +      clock-names = "aux", "cfg_ahb", "anoc_lane", "snoc_lane", "pipe";
>> +
>> +      resets = <&gcc GCC_PCIE0_PHY_BCR>,
>> +               <&gcc GCC_PCIE0PHY_PHY_BCR>;
>> +      reset-names = "phy", "common";
>> +
>> +      #clock-cells = <0>;
>> +      clock-output-names = "gcc_pcie0_pipe_clk_src";
>> +
>> +      #phy-cells = <0>;
>> +    };
>