linux-kernel - Re: [PATCH 2/3] arm64: dts: qcom: sa8775p: Add CPU OPP tables to scale DDR/L3

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Message-ID: <ZxEwVShJuMH4J1Hp@x1>
Date: Thu, 17 Oct 2024 11:42:13 -0400
From: Brian Masney <bmasney@...hat.com>
To: Jagadeesh Kona <quic_jkona@...cinc.com>
Cc: Bjorn Andersson <andersson@...nel.org>,
	Konrad Dybcio <konradybcio@...nel.org>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>, linux-arm-msm@...r.kernel.org,
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
	Ajit Pandey <quic_ajipan@...cinc.com>,
	Imran Shaik <quic_imrashai@...cinc.com>,
	Taniya Das <quic_tdas@...cinc.com>,
	Satya Priya Kakitapalli <quic_skakitap@...cinc.com>,
	Shivnandan Kumar <quic_kshivnan@...cinc.com>
Subject: Re: [PATCH 2/3] arm64: dts: qcom: sa8775p: Add CPU OPP tables to
 scale DDR/L3

On Thu, Oct 17, 2024 at 02:58:31PM +0530, Jagadeesh Kona wrote:
> +	cpu0_opp_table: opp-table-cpu0 {
> +		compatible = "operating-points-v2";
> +		opp-shared;
> +
> +		cpu0_opp_1267mhz: opp-1267200000 {
> +			opp-hz = /bits/ 64 <1267200000>;
> +			opp-peak-kBps = <6220800 29491200>;
> +		};
> +
> +		cpu0_opp_1363mhz: opp-1363200000 {
> +			opp-hz = /bits/ 64 <1363200000>;
> +			opp-peak-kBps = <6220800 29491200>;
> +		};

[snip]

> +	cpu4_opp_table: opp-table-cpu4 {
> +		compatible = "operating-points-v2";
> +		opp-shared;
> +
> +		cpu4_opp_1267mhz: opp-1267200000 {
> +			opp-hz = /bits/ 64 <1267200000>;
> +			opp-peak-kBps = <6220800 29491200>;
> +		};
> +
> +		cpu4_opp_1363mhz: opp-1363200000 {
> +			opp-hz = /bits/ 64 <1363200000>;
> +			opp-peak-kBps = <6220800 29491200>;
> +		};

There's no functional differences in the cpu0 and cpu4 opp tables. Can
a single table be used?

This aligns with my recollection that this particular SoC only has the
gold cores.

Brian