[PATCH v4 2/4] arm64: dts: qcom: sm8450: Add opp table support to PCIe

[Krishna chaitanya chundru]

PCIe needs to choose the appropriate performance state of RPMH power
domain based up on the PCIe gen speed.

So let's add the OPP table support to specify RPMH performance states.

Use opp-level for the PCIe gen speed for easier use.

Signed-off-by: Krishna chaitanya chundru <quic_krichai@xxxxxxxxxxx>
---
 arch/arm64/boot/dts/qcom/sm8450.dtsi | 47 ++++++++++++++++++++++++++++++++++++
 1 file changed, 47 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/sm8450.dtsi b/arch/arm64/boot/dts/qcom/sm8450.dtsi
index 595533a..3af0cf9 100644
--- a/arch/arm64/boot/dts/qcom/sm8450.dtsi
+++ b/arch/arm64/boot/dts/qcom/sm8450.dtsi
@@ -1803,7 +1803,28 @@
 			pinctrl-names = "default";
 			pinctrl-0 = <&pcie0_default_state>;
 
+			operating-points-v2 = <&pcie0_opp_table>;
+
 			status = "disabled";
+
+			pcie0_opp_table: opp-table {
+				compatible = "operating-points-v2";
+
+				opp-1 {
+					opp-level = <1>;
+					required-opps = <&rpmhpd_opp_low_svs>;
+				};
+
+				opp-2 {
+					opp-level = <2>;
+					required-opps = <&rpmhpd_opp_low_svs>;
+				};
+
+				opp-3 {
+					opp-level = <3>;
+					required-opps = <&rpmhpd_opp_nom>;
+				};
+			};
 		};
 
 		pcie0_phy: phy@1c06000 {
@@ -1915,7 +1936,33 @@
 			pinctrl-names = "default";
 			pinctrl-0 = <&pcie1_default_state>;
 
+			operating-points-v2 = <&pcie1_opp_table>;
+
 			status = "disabled";
+
+			pcie1_opp_table: opp-table {
+				compatible = "operating-points-v2";
+
+				opp-1 {
+					opp-level = <1>;
+					required-opps = <&rpmhpd_opp_low_svs>;
+				};
+
+				opp-2 {
+					opp-level = <2>;
+					required-opps = <&rpmhpd_opp_low_svs>;
+				};
+
+				opp-3 {
+					opp-level = <3>;
+					required-opps = <&rpmhpd_opp_low_svs>;
+				};
+
+				opp-4 {
+					opp-level = <4>;
+					required-opps = <&rpmhpd_opp_nom>;
+				};
+			};
 		};
 
 		pcie1_phy: phy@1c0f000 {
-- 
2.7.4