linux-kernel - Re: [PATCH v2 05/14] arm64: dts: qcom: sc7280: Add RSC and PDC devices

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Message-ID: <ac4f5cf8-0bf0-b7c3-2d50-ae7d48cbc885@codeaurora.org>
Date:   Mon, 8 Mar 2021 10:51:04 +0530
From:   Maulik Shah <mkshah@...eaurora.org>
To:     Rajendra Nayak <rnayak@...eaurora.org>,
        Stephen Boyd <swboyd@...omium.org>, agross@...nel.org,
        bjorn.andersson@...aro.org, robh+dt@...nel.org
Cc:     linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 05/14] arm64: dts: qcom: sc7280: Add RSC and PDC
 devices

Hi,

On 3/5/2021 11:12 AM, Rajendra Nayak wrote:
>
> On 3/4/2021 5:34 AM, Stephen Boyd wrote:
>> Quoting Rajendra Nayak (2021-03-03 04:17:49)
>>> diff --git a/arch/arm64/boot/dts/qcom/sc7280.dtsi 
>>> b/arch/arm64/boot/dts/qcom/sc7280.dtsi
>>> index 4a56d9c..21c2399 100644
>>> --- a/arch/arm64/boot/dts/qcom/sc7280.dtsi
>>> +++ b/arch/arm64/boot/dts/qcom/sc7280.dtsi
>>> @@ -30,6 +31,18 @@
>>>                  };
>>>          };
>>>   +       reserved_memory: reserved-memory {
>>
>> Do we plan to use this label at any point? I'd prefer we remove this
>> until it becomes useful.
>
> sure, i'll drop it
>
>>
>>> +               #address-cells = <2>;
>>> +               #size-cells = <2>;
>>> +               ranges;
>>> +
>>> +               aop_cmd_db_mem: memory@...60000 {
>>> +                       reg = <0x0 0x80860000 0x0 0x20000>;
>>> +                       compatible = "qcom,cmd-db";
>>> +                       no-map;
>>> +               };
>>> +       };
>>> +
>>>          cpus {
>>>                  #address-cells = <2>;
>>>                  #size-cells = <0>;
>>> @@ -203,6 +229,7 @@
>>>                          interrupt-controller;
>>>                          #interrupt-cells = <2>;
>>>                          gpio-ranges = <&tlmm 0 0 175>;
>>> +                       wakeup-parent = <&pdc>;
>>>                            qup_uart5_default: qup-uart5-default {
>>>                                  pins = "gpio46", "gpio47";
>>> @@ -287,6 +314,23 @@
>>>                                  status = "disabled";
>>>                          };
>>>                  };
>>> +
>>> +               apps_rsc: rsc@...00000 {
>>
>> Any better name than 'rsc'? Maybe 'power-controller'?
>
> hmm, Maulik, any thoughts? This would perhaps need the bindings docs
> to be updated as well (and maybe the existing platform DTs using rsc too)

I think we should be good with rsc (resource-state-coordinator). RSC 
itself don't do any resource power management.

Thanks,
Maulik
>
>>
>>> +                       compatible = "qcom,rpmh-rsc";
>>> +                       reg = <0 0x18200000 0 0x10000>,
>>> +                             <0 0x18210000 0 0x10000>,
>>> +                             <0 0x18220000 0 0x10000>;
>>> +                       reg-names = "drv-0", "drv-1", "drv-2";
>>> +                       interrupts = <GIC_SPI 3 IRQ_TYPE_LEVEL_HIGH>,
>>> +                                    <GIC_SPI 4 IRQ_TYPE_LEVEL_HIGH>,
>>> +                                    <GIC_SPI 5 IRQ_TYPE_LEVEL_HIGH>;
>>> +                       qcom,tcs-offset = <0xd00>;
>>> +                       qcom,drv-id = <2>;
>>> +                       qcom,tcs-config = <ACTIVE_TCS 2>,
>>> +                                         <SLEEP_TCS 3>,
>>> +                                         <WAKE_TCS 3>,
>>> +                                         <CONTROL_TCS 1>;
>>> +               };
>>>          };
>
-- 
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