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

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <07342311-33e3-cf7e-38ed-5d54d83b43a3@linaro.org>
Date:   Mon, 20 Feb 2023 15:36:54 +0100
From:   Konrad Dybcio <konrad.dybcio@...aro.org>
To:     Devi Priya <quic_devipriy@...cinc.com>, 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 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.

> 
> 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.

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