linux-kernel - [PATCH v2 2/3] arm64: dts: qcom: sm8450: Add opp-level to indicate PCIe data rates

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Message-Id: <20250818-opp_pcie-v2-2-071524d98967@oss.qualcomm.com>
Date: Mon, 18 Aug 2025 13:52:54 +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 v2 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.

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