linux-kernel - [PATCH v6 5/6] arm64: dts: qcom: sm8450: Add opp table support to PCIe

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Message-ID: <20240112-opp_support-v6-5-77bbf7d0cc37@quicinc.com>
Date: Fri, 12 Jan 2024 19:52:04 +0530
From: Krishna chaitanya chundru <quic_krichai@...cinc.com>
To: Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio
	<konrad.dybcio@...aro.org>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        "Lorenzo
 Pieralisi" <lpieralisi@...nel.org>,
        Krzysztof Wilczyński
	<kw@...ux.com>,
        Rob Herring <robh@...nel.org>,
        Krzysztof Kozlowski
	<krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Manivannan Sadhasivam <mani@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Johan Hovold <johan+linaro@...nel.org>,
        Brian Masney <bmasney@...hat.com>, Georgi Djakov <djakov@...nel.org>
CC: <linux-arm-msm@...r.kernel.org>, <vireshk@...nel.org>,
        <quic_vbadigan@...cinc.com>, <quic_skananth@...cinc.com>,
        <quic_nitegupt@...cinc.com>, <linux-pci@...r.kernel.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        "Krishna
 chaitanya chundru" <quic_krichai@...cinc.com>
Subject: [PATCH v6 5/6] arm64: dts: qcom: sm8450: Add opp table support to
 PCIe

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

Add the OPP table support to specify RPMH performance states and
interconnect peak bandwidth.

Signed-off-by: Krishna chaitanya chundru <quic_krichai@...cinc.com>
---
 arch/arm64/boot/dts/qcom/sm8450.dtsi | 74 ++++++++++++++++++++++++++++++++++++
 1 file changed, 74 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/sm8450.dtsi b/arch/arm64/boot/dts/qcom/sm8450.dtsi
index 6b1d2e0d9d14..eab85ecaeff0 100644
--- a/arch/arm64/boot/dts/qcom/sm8450.dtsi
+++ b/arch/arm64/boot/dts/qcom/sm8450.dtsi
@@ -1827,7 +1827,32 @@ pcie0: pcie@...0000 {
 			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-2500000 {
+					opp-hz = /bits/ 64 <2500000>;
+					required-opps = <&rpmhpd_opp_low_svs>;
+					opp-peak-kBps = <250000 250000>;
+				};
+
+				opp-5000000 {
+					opp-hz = /bits/ 64 <5000000>;
+					required-opps = <&rpmhpd_opp_low_svs>;
+					opp-peak-kBps = <500000 250000>;
+				};
+
+				opp-8000000 {
+					opp-hz = /bits/ 64 <8000000>;
+					required-opps = <&rpmhpd_opp_nom>;
+					opp-peak-kBps = <984500 250000>;
+				};
+			};
+
 		};
 
 		pcie0_phy: phy@...6000 {
@@ -1938,7 +1963,56 @@ pcie1: pcie@...8000 {
 			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";
+
+				/* GEN 1x1 */
+				opp-2500000 {
+					opp-hz = /bits/ 64 <2500000>;
+					required-opps = <&rpmhpd_opp_low_svs>;
+					opp-peak-kBps = <250000 250000>;
+				};
+
+				/* GEN 1x2 GEN 2x1 */
+				opp-5000000 {
+					opp-hz = /bits/ 64 <5000000>;
+					required-opps = <&rpmhpd_opp_low_svs>;
+					opp-peak-kBps = <500000 250000>;
+				};
+
+				/* GEN 2x2 */
+				opp-10000000 {
+					opp-hz = /bits/ 64 <10000000>;
+					required-opps = <&rpmhpd_opp_low_svs>;
+					opp-peak-kBps = <1000000 250000>;
+				};
+
+				/* GEN 3x1 */
+				opp-8000000 {
+					opp-hz = /bits/ 64 <8000000>;
+					required-opps = <&rpmhpd_opp_nom>;
+					opp-peak-kBps = <984500 250000>;
+				};
+
+				/* GEN 3x2 GEN 4x1 */
+				opp-16000000 {
+					opp-hz = /bits/ 64 <16000000>;
+					required-opps = <&rpmhpd_opp_nom>;
+					opp-peak-kBps = <1969000 250000>;
+				};
+
+				/* GEN 4x2 */
+				opp-32000000 {
+					opp-hz = /bits/ 64 <32000000>;
+					required-opps = <&rpmhpd_opp_nom>;
+					opp-peak-kBps = <3938000 250000>;
+				};
+			};
+
 		};
 
 		pcie1_phy: phy@...e000 {

-- 
2.42.0