linux-kernel - Re: [PATCH V3 5/5] arm64: dts: qcom: ipq9574: Add cpufreq support

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Message-ID: <1ffee0eb-84cc-98b1-77d3-84c6509b0a1a@quicinc.com>
Date:   Fri, 7 Apr 2023 19:54:22 +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_sjaganat@...cinc.com>,
        <quic_kathirav@...cinc.com>, <quic_arajkuma@...cinc.com>,
        <quic_anusha@...cinc.com>, <quic_ipkumar@...cinc.com>
Subject: Re: [PATCH V3 5/5] arm64: dts: qcom: ipq9574: Add cpufreq support



On 4/7/2023 5:29 PM, Konrad Dybcio wrote:
> 
> 
> On 7.04.2023 06:53, Devi Priya wrote:
>>
>>
>> On 4/7/2023 1:21 AM, Konrad Dybcio wrote:
>>>
>>>
>>> On 6.04.2023 09:00, Devi Priya wrote:
>>>> Add cpu freq nodes in the device tree to bump cpu frequency above 800MHz.
>>>>
>>>> Co-developed-by: Praveenkumar I <quic_ipkumar@...cinc.com>
>>>> Signed-off-by: Praveenkumar I <quic_ipkumar@...cinc.com>
>>>> Signed-off-by: Devi Priya <quic_devipriy@...cinc.com>
>>>> ---
>>>>    Changes in V3:
>>>>      - No change
>>>>
>>>>    arch/arm64/boot/dts/qcom/ipq9574.dtsi | 58 +++++++++++++++++++++++++++
>>>>    1 file changed, 58 insertions(+)
>>>>
>>>> diff --git a/arch/arm64/boot/dts/qcom/ipq9574.dtsi b/arch/arm64/boot/dts/qcom/ipq9574.dtsi
>>>> index 1f9b7529e7ed..cfef87b5fd22 100644
>>>> --- a/arch/arm64/boot/dts/qcom/ipq9574.dtsi
>>>> +++ b/arch/arm64/boot/dts/qcom/ipq9574.dtsi
>>>> @@ -6,6 +6,7 @@
>>>>     * Copyright (c) 2023, Qualcomm Innovation Center, Inc. All rights reserved.
>>>>     */
>>>>    +#include <dt-bindings/clock/qcom,apss-ipq.h>
>>>>    #include <dt-bindings/clock/qcom,ipq9574-gcc.h>
>>>>    #include <dt-bindings/interrupt-controller/arm-gic.h>
>>>>    #include <dt-bindings/reset/qcom,ipq9574-gcc.h>
>>>> @@ -37,6 +38,10 @@
>>>>                reg = <0x0>;
>>>>                enable-method = "psci";
>>>>                next-level-cache = <&L2_0>;
>>>> +            clocks = <&apcs_glb APCS_ALIAS0_CORE_CLK>;
>>>> +            clock-names = "cpu";
>>>> +            operating-points-v2 = <&cpu_opp_table>;
>>>> +            cpu-supply = <&ipq9574_s1>;
>>>>            };
>>>>              CPU1: cpu@1 {
>>>> @@ -45,6 +50,10 @@
>>>>                reg = <0x1>;
>>>>                enable-method = "psci";
>>>>                next-level-cache = <&L2_0>;
>>>> +            clocks = <&apcs_glb APCS_ALIAS0_CORE_CLK>;
>>>> +            clock-names = "cpu";
>>>> +            operating-points-v2 = <&cpu_opp_table>;
>>>> +            cpu-supply = <&ipq9574_s1>;
>>>>            };
>>>>              CPU2: cpu@2 {
>>>> @@ -53,6 +62,10 @@
>>>>                reg = <0x2>;
>>>>                enable-method = "psci";
>>>>                next-level-cache = <&L2_0>;
>>>> +            clocks = <&apcs_glb APCS_ALIAS0_CORE_CLK>;
>>>> +            clock-names = "cpu";
>>>> +            operating-points-v2 = <&cpu_opp_table>;
>>>> +            cpu-supply = <&ipq9574_s1>;
>>>>            };
>>>>              CPU3: cpu@3 {
>>>> @@ -61,6 +74,10 @@
>>>>                reg = <0x3>;
>>>>                enable-method = "psci";
>>>>                next-level-cache = <&L2_0>;
>>>> +            clocks = <&apcs_glb APCS_ALIAS0_CORE_CLK>;
>>>> +            clock-names = "cpu";
>>>> +            operating-points-v2 = <&cpu_opp_table>;
>>>> +            cpu-supply = <&ipq9574_s1>;
>>>>            };
>>>>              L2_0: l2-cache {
>>>> @@ -75,6 +92,47 @@
>>>>            reg = <0x0 0x40000000 0x0 0x0>;
>>>>        };
>>>>    +    cpu_opp_table: opp-table-cpu {
>>> This is not sorted properly. It should probably come
>>> after memory alphabetically ('o' > 'm')
>>>
>> Yes, But I see that opp-table-cpu node is already placed after
>> memory@...00000
> 
> Oh you're right, the diff doesn't really show that very
> well and I didn't notice..
> 
> 
> Reviewed-by: Konrad Dybcio <konrad.dybcio@...aro.org>
Sure, thank you!
> 
> Konrad
>>> Konrad
>>>> +        compatible = "operating-points-v2";
>>>> +        opp-shared;
>>>> +
>>>> +        opp-936000000 {
>>>> +            opp-hz = /bits/ 64 <936000000>;
>>>> +            opp-microvolt = <725000>;
>>>> +            clock-latency-ns = <200000>;
>>>> +        };
>>>> +
>>>> +        opp-1104000000 {
>>>> +            opp-hz = /bits/ 64 <1104000000>;
>>>> +            opp-microvolt = <787500>;
>>>> +            clock-latency-ns = <200000>;
>>>> +        };
>>>> +
>>>> +        opp-1416000000 {
>>>> +            opp-hz = /bits/ 64 <1416000000>;
>>>> +            opp-microvolt = <862500>;
>>>> +            clock-latency-ns = <200000>;
>>>> +        };
>>>> +
>>>> +        opp-1488000000 {
>>>> +            opp-hz = /bits/ 64 <1488000000>;
>>>> +            opp-microvolt = <925000>;
>>>> +            clock-latency-ns = <200000>;
>>>> +        };
>>>> +
>>>> +        opp-1800000000 {
>>>> +            opp-hz = /bits/ 64 <1800000000>;
>>>> +            opp-microvolt = <987500>;
>>>> +            clock-latency-ns = <200000>;
>>>> +        };
>>>> +
>>>> +        opp-2208000000 {
>>>> +            opp-hz = /bits/ 64 <2208000000>;
>>>> +            opp-microvolt = <1062500>;
>>>> +            clock-latency-ns = <200000>;
>>>> +        };
>>>> +    };
>>>> +
>>>>        firmware {
>>>>            scm {
>>>>                compatible = "qcom,scm-ipq9574", "qcom,scm";
>> Best Regards,
>> Devi Priya