linux-kernel - Re: [PATCH V2 5/6] arm64: dts: qcom: ipq9574: Add RPM related nodes

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Message-ID: <ba4854dd-2e6c-1fd7-8914-a5a22bd8890a@quicinc.com>
Date:   Mon, 20 Feb 2023 20:52:24 +0530
From:   Devi Priya <quic_devipriy@...cinc.com>
To:     Konrad Dybcio <konrad.dybcio@...aro.org>, <agross@...nel.org>,
        <andersson@...nel.org>, <lgirdwood@...il.com>,
        <broonie@...nel.org>, <robh+dt@...nel.org>,
        <krzysztof.kozlowski+dt@...aro.org>,
        <linux-arm-msm@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <devicetree@...r.kernel.org>
CC:     <quic_srichara@...cinc.com>, <quic_gokulsri@...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 5/6] arm64: dts: qcom: ipq9574: Add RPM related nodes



On 2/20/2023 8:06 PM, Konrad Dybcio wrote:
> 
> 
> On 20.02.2023 14:53, Devi Priya wrote:
>> Hi Konrad,
>>
>> Thanks for taking time to review the patch!
> I appreciate your gratitude, but please don't toppost (a.k.a
> don't reply in the first lines of the email), that's rather
> frowned upon on LKML.
> 
Sure, understood!
>>
>> On 2/17/2023 8:20 PM, Konrad Dybcio wrote:
>>>
>>>
>>> On 17.02.2023 15:20, Devi Priya wrote:
>>>> Add RPM Glink, RPM message RAM and SMPA1 regulator
>>>> nodes to support frequency scaling on IPQ9574
>>>>
>>>> Signed-off-by: Devi Priya <quic_devipriy@...cinc.com>
>>>> ---
>>>>    Changes in V2:
>>>>      - Splitted the RPM and CPU Freq changes to individual patches
>>>>      - Moved the regulators node to Board DT
>>>>      - Dropped the regulator-always-on property
>>>>      - Updated the compatible in regulators node with the existing
>>>>        mp5496 compatible
>>>>
>>>>    arch/arm64/boot/dts/qcom/ipq9574-al02-c7.dts | 11 +++++++++++
>>>>    arch/arm64/boot/dts/qcom/ipq9574.dtsi        | 17 +++++++++++++++++
>>>>    2 files changed, 28 insertions(+)
>>>>
>>>> diff --git a/arch/arm64/boot/dts/qcom/ipq9574-al02-c7.dts b/arch/arm64/boot/dts/qcom/ipq9574-al02-c7.dts
>>>> index 21b53f34ce84..8a6caaeb0c4b 100644
>>>> --- a/arch/arm64/boot/dts/qcom/ipq9574-al02-c7.dts
>>>> +++ b/arch/arm64/boot/dts/qcom/ipq9574-al02-c7.dts
>>>> @@ -57,6 +57,17 @@
>>>>        status = "okay";
>>>>    };
>>>>    +&rpm_requests {
>>>> +    regulators {
>>>> +        compatible = "qcom,rpm-mp5496-regulators";
>>>> +
>>>> +        ipq9574_s1: s1 {
>>>> +            regulator-min-microvolt = <587500>;
>>>> +            regulator-max-microvolt = <1075000>;
>>>> +        };
>>>> +    };
>>>> +};
>>> This belongs in a separate patch.
>>>
>> Do you recommend to move this change to the below patch in the next spin?
>> [PATCH V2 6/6]arm64: dts: qcom: ipq9574: Add cpufreq support
> Sounds good
> 
> Also, I think you missed a newline before &rpm_requests now that
> I look at it.
Sure, will take care of that in V3
> 
> Konrad
>>>> +
>>>>    &sdhc_1 {
>>>>        pinctrl-0 = <&sdc_default_state>;
>>>>        pinctrl-names = "default";
>>>> diff --git a/arch/arm64/boot/dts/qcom/ipq9574.dtsi b/arch/arm64/boot/dts/qcom/ipq9574.dtsi
>>>> index d20f3c7383f5..2f300cbab93e 100644
>>>> --- a/arch/arm64/boot/dts/qcom/ipq9574.dtsi
>>>> +++ b/arch/arm64/boot/dts/qcom/ipq9574.dtsi
>>>> @@ -133,6 +133,11 @@
>>>>            #size-cells = <2>;
>>>>            ranges;
>>>>    +        rpm_msg_ram: rpm@...00 {
>>> Since this is a part of the MMIO region and not a part of DRAM,
>>> we generally put this node under /soc with the compatible of
>>> qcom,rpm-msg-ram and without no-map.
>>>
>>> And the node name then should be sram@.
>> Sure, okay. Will update this in V3
>>>
>>>> +            reg = <0x0 0x00060000 0x0 0x6000>;
>>>> +            no-map;
>>>> +        };
>>>> +
>>>>            tz_region: tz@...00000 {
>>>>                reg = <0x0 0x4a600000 0x0 0x400000>;
>>>>                no-map;
>>>> @@ -768,6 +773,18 @@
>>>>            };
>>>>        };
>>>>    +    rpm-glink {
>>> Alphabetically this should come before /soc.
>> Okay
>>>
>>> Konrad
>>>> +        compatible = "qcom,glink-rpm";
>>>> +        interrupts = <GIC_SPI 168 IRQ_TYPE_EDGE_RISING>;
>>>> +        qcom,rpm-msg-ram = <&rpm_msg_ram>;
>>>> +        mboxes = <&apcs_glb 0>;
>>>> +
>>>> +        rpm_requests: glink-channel {
>>>> +            compatible = "qcom,rpm-ipq9574";
>>>> +            qcom,glink-channels = "rpm_requests";
>>>> +        };
>>>> +    };
>>>> +
>>>>        timer {
>>>>            compatible = "arm,armv8-timer";
>>>>            interrupts = <GIC_PPI 2 (GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_LOW)>,
>> Best Regards,
>> Devi Priya