linux-kernel - Re: [PATCH 2/3] arm64: dts: qcom: sm6350: Add OPP table support to UFSHC

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Message-ID: <cddcd851-5e8c-4202-baad-e56a09d5775a@oss.qualcomm.com>
Date: Fri, 14 Mar 2025 23:08:10 +0100
From: Konrad Dybcio <konrad.dybcio@....qualcomm.com>
To: Luca Weiss <luca.weiss@...rphone.com>,
        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>
Cc: ~postmarketos/upstreaming@...ts.sr.ht, phone-devel@...r.kernel.org,
        Krzysztof Kozlowski <krzk@...nel.org>, linux-arm-msm@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/3] arm64: dts: qcom: sm6350: Add OPP table support to
 UFSHC

On 3/14/25 10:17 AM, Luca Weiss wrote:
> UFS host controller, when scaling gears, should choose appropriate
> performance state of RPMh power domain controller along with clock
> frequency. So let's add the OPP table support to specify both clock
> frequency and RPMh performance states replacing the old "freq-table-hz"
> property.
> 
> Signed-off-by: Luca Weiss <luca.weiss@...rphone.com>
> ---

[...]

> +
> +			ufs_opp_table: opp-table {
> +				compatible = "operating-points-v2";
> +
> +				opp-50000000 {
> +					opp-hz = /bits/ 64 <50000000>,
> +						 /bits/ 64 <0>,
> +						 /bits/ 64 <0>,
> +						 /bits/ 64 <37500000>,

This rate on this clk requires opp_svs (not low_svs)

with that:

Reviewed-by: Konrad Dybcio <konrad.dybcio@....qualcomm.com>

Konrad