linux-kernel - [PATCH v4 4/7] arm64: dts: qcom: sm8550: Add opp-level to indicate PCIe data rates

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Message-Id: <20250820-opp_pcie-v4-4-273b8944eed0@oss.qualcomm.com>
Date: Wed, 20 Aug 2025 13:58:50 +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 v4 4/7] arm64: dts: qcom: sm8550: 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/sm8550.dtsi | 63 ++++++++++++++++++++++++++++--------
 1 file changed, 49 insertions(+), 14 deletions(-)

diff --git a/arch/arm64/boot/dts/qcom/sm8550.dtsi b/arch/arm64/boot/dts/qcom/sm8550.dtsi
index 45713d46f3c52487d2638b7ab194c111f58679ce..c51489b5cd8a5e73797f9a4381bc7588259a8bf5 100644
--- a/arch/arm64/boot/dts/qcom/sm8550.dtsi
+++ b/arch/arm64/boot/dts/qcom/sm8550.dtsi
@@ -2028,38 +2028,51 @@ pcie0_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 {
+				opp-16000000-3 {
 					opp-hz = /bits/ 64 <16000000>;
 					required-opps = <&rpmhpd_opp_nom>;
 					opp-peak-kBps = <1969000 1>;
+					opp-level = <3>;
 				};
 			};
 
@@ -2195,45 +2208,67 @@ 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 */
+				opp-5000000-1 {
+					opp-hz = /bits/ 64 <5000000>;
+					required-opps = <&rpmhpd_opp_low_svs>;
+					opp-peak-kBps = <500000 1>;
+					opp-level = <1>;
 				};
 
-				/* GEN 1 x2 and GEN 2 x1 */
-				opp-5000000 {
+				/* 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