linux-kernel - Re: [PATCH v3 4/7] arm64: dts: qcom: sdm845: control RPMHPD performance states with UFS

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Date:   Mon, 30 May 2022 09:42:27 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Viresh Kumar <viresh.kumar@...aro.org>
Cc:     Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Viresh Kumar <vireshk@...nel.org>, Nishanth Menon <nm@...com>,
        Alim Akhtar <alim.akhtar@...sung.com>,
        Avri Altman <avri.altman@....com>,
        "James E.J. Bottomley" <jejb@...ux.ibm.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Taniya Das <tdas@...eaurora.org>,
        linux-arm-msm@...r.kernel.org, linux-clk@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-pm@...r.kernel.org, linux-scsi@...r.kernel.org,
        Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
Subject: Re: [PATCH v3 4/7] arm64: dts: qcom: sdm845: control RPMHPD
 performance states with UFS

On 25/05/2022 09:16, Viresh Kumar wrote:
> On 13-05-22, 08:13, Krzysztof Kozlowski wrote:
>> +			ufs_opp_table: opp-table {
>> +				compatible = "operating-points-v2";
>> +
>> +				opp-50000000 {
>> +					opp-hz = /bits/ 64 <50000000
>> +						 0
>> +						 0
>> +						 37500000
>> +						 0
>> +						 0
>> +						 0
>> +						 0
>> +						 // FIXME: value 0 copied from freq-table-hz
>> +						 0>;
> 
> One general comment, I think this should follow how we specify
> multiple voltages or other fields and so each frequency should be part
> of a different < > braces. Like: opp-hz = /bits/ 64 <5000000>, <0>, ....
> 
> Whatever is there between < > seems to be connected, like
> min/max/target for voltage.
> 
> The code will process both in a similar way though eventually.

OK, I can change to such format.

Best regards,
Krzysztof