linux-kernel - [PATCH v3 2/3] arm64: dts: qcom: sm8450: Add opp-level to indicate PCIe data rates

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Message-Id: <20250819-opp_pcie-v3-2-f8bd7e05ce41@oss.qualcomm.com>
Date: Tue, 19 Aug 2025 11:04:43 +0530
From: Krishna Chaitanya Chundru <krishna.chundru@....qualcomm.com>
To: Viresh Kumar <vireshk@...nel.org>, Nishanth Menon <nm@...com>,
        Stephen Boyd <sboyd@...nel.org>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Manivannan Sadhasivam <mani@...nel.org>,
        Lorenzo Pieralisi <lpieralisi@...nel.org>,
        Krzysztof Wilczyński <kwilczynski@...nel.org>,
        Rob Herring <robh@...nel.org>, Bjorn Helgaas <bhelgaas@...gle.com>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konradybcio@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley <conor+dt@...nel.org>
Cc: linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-pci@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        devicetree@...r.kernel.org,
        Krishna Chaitanya Chundru <krishna.chundru@....qualcomm.com>
Subject: [PATCH v3 2/3] arm64: dts: qcom: sm8450: Add opp-level to indicate
 PCIe data rates

Add opp-level to indicate PCIe data rates and also define OPP enteries
for each link width and data rate. Append the opp level to name of the
opp node to indicate both frequency and level.

Signed-off-by: Krishna Chaitanya Chundru <krishna.chundru@....qualcomm.com>
---
 arch/arm64/boot/dts/qcom/sm8450.dtsi | 41 +++++++++++++++++++++++++++++-------
 1 file changed, 33 insertions(+), 8 deletions(-)

diff --git a/arch/arm64/boot/dts/qcom/sm8450.dtsi b/arch/arm64/boot/dts/qcom/sm8450.dtsi
index 33574ad706b915136546c7f92c7cd0b8a0d62b7e..d7f8706ca4949e253a4102474c92b393a345262f 100644
--- a/arch/arm64/boot/dts/qcom/sm8450.dtsi
+++ b/arch/arm64/boot/dts/qcom/sm8450.dtsi
@@ -2052,6 +2052,7 @@ opp-2500000 {
 					opp-hz = /bits/ 64 <2500000>;
 					required-opps = <&rpmhpd_opp_low_svs>;
 					opp-peak-kBps = <250000 1>;
+					opp-level = <1>;
 				};
 
 				/* GEN 2 x1 */
@@ -2059,6 +2060,7 @@ opp-5000000 {
 					opp-hz = /bits/ 64 <5000000>;
 					required-opps = <&rpmhpd_opp_low_svs>;
 					opp-peak-kBps = <500000 1>;
+					opp-level = <2>;
 				};
 
 				/* GEN 3 x1 */
@@ -2066,6 +2068,7 @@ opp-8000000 {
 					opp-hz = /bits/ 64 <8000000>;
 					required-opps = <&rpmhpd_opp_nom>;
 					opp-peak-kBps = <984500 1>;
+					opp-level = <3>;
 				};
 			};
 
@@ -2210,45 +2213,67 @@ pcie1_opp_table: opp-table {
 				compatible = "operating-points-v2";
 
 				/* GEN 1 x1 */
-				opp-2500000 {
+				opp-2500000-1 {
 					opp-hz = /bits/ 64 <2500000>;
 					required-opps = <&rpmhpd_opp_low_svs>;
 					opp-peak-kBps = <250000 1>;
+					opp-level = <1>;
 				};
 
-				/* GEN 1 x2 and GEN 2 x1 */
-				opp-5000000 {
+				/* GEN 1 x2 */
+				opp-5000000-1 {
+					opp-hz = /bits/ 64 <5000000>;
+					required-opps = <&rpmhpd_opp_low_svs>;
+					opp-peak-kBps = <500000 1>;
+					opp-level = <1>;
+				};
+
+				/* GEN 2 x1 */
+				opp-5000000-2 {
 					opp-hz = /bits/ 64 <5000000>;
 					required-opps = <&rpmhpd_opp_low_svs>;
 					opp-peak-kBps = <500000 1>;
+					opp-level = <2>;
 				};
 
 				/* GEN 2 x2 */
-				opp-10000000 {
+				opp-10000000-2 {
 					opp-hz = /bits/ 64 <10000000>;
 					required-opps = <&rpmhpd_opp_low_svs>;
 					opp-peak-kBps = <1000000 1>;
+					opp-level = <2>;
 				};
 
 				/* GEN 3 x1 */
-				opp-8000000 {
+				opp-8000000-3 {
 					opp-hz = /bits/ 64 <8000000>;
 					required-opps = <&rpmhpd_opp_nom>;
 					opp-peak-kBps = <984500 1>;
+					opp-level = <3>;
+				};
+
+				/* GEN 3 x2 */
+				opp-16000000-3 {
+					opp-hz = /bits/ 64 <16000000>;
+					required-opps = <&rpmhpd_opp_nom>;
+					opp-peak-kBps = <1969000 1>;
+					opp-level = <3>;
 				};
 
-				/* GEN 3 x2 and GEN 4 x1 */
-				opp-16000000 {
+				/* GEN 4 x1 */
+				opp-16000000-4 {
 					opp-hz = /bits/ 64 <16000000>;
 					required-opps = <&rpmhpd_opp_nom>;
 					opp-peak-kBps = <1969000 1>;
+					opp-level = <4>;
 				};
 
 				/* GEN 4 x2 */
-				opp-32000000 {
+				opp-32000000-4 {
 					opp-hz = /bits/ 64 <32000000>;
 					required-opps = <&rpmhpd_opp_nom>;
 					opp-peak-kBps = <3938000 1>;
+					opp-level = <4>;
 				};
 			};
 

-- 
2.34.1