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

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



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




[Index of Archives]     [Device Tree Compilter]     [Device Tree Spec]     [Linux Driver Backports]     [Video for Linux]     [Linux USB Devel]     [Linux PCI Devel]     [Linux Audio Users]     [Linux Kernel]     [Linux SCSI]     [XFree86]     [Yosemite Backpacking]


  Powered by Linux