linux-kernel - [PATCH v3 05/10] arm64: dts: qcom: sc8280xp: add missing PCIe minimum OPP

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Message-ID: <20240305081105.11912-6-johan+linaro@kernel.org>
Date: Tue,  5 Mar 2024 09:11:00 +0100
From: Johan Hovold <johan+linaro@...nel.org>
To: Bjorn Helgaas <bhelgaas@...gle.com>,
	Bjorn Andersson <andersson@...nel.org>
Cc: Konrad Dybcio <konrad.dybcio@...aro.org>,
	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 <manivannan.sadhasivam@...aro.org>,
	linux-arm-msm@...r.kernel.org,
	linux-pci@...r.kernel.org,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Johan Hovold <johan+linaro@...nel.org>,
	stable@...r.kernel.org
Subject: [PATCH v3 05/10] arm64: dts: qcom: sc8280xp: add missing PCIe minimum OPP

Add the missing PCIe CX performance level votes to avoid relying on
other drivers (e.g. USB or UFS) to maintain the nominal performance
level required for Gen3 speeds.

Fixes: 813e83157001 ("arm64: dts: qcom: sc8280xp/sa8540p: add PCIe2-4 nodes")
Cc: stable@...r.kernel.org      # 6.2
Reviewed-by: Konrad Dybcio <konrad.dybcio@...aro.org>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
Signed-off-by: Johan Hovold <johan+linaro@...nel.org>
---
 arch/arm64/boot/dts/qcom/sc8280xp.dtsi | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/sc8280xp.dtsi b/arch/arm64/boot/dts/qcom/sc8280xp.dtsi
index c8e84c53935c..424d143ee26a 100644
--- a/arch/arm64/boot/dts/qcom/sc8280xp.dtsi
+++ b/arch/arm64/boot/dts/qcom/sc8280xp.dtsi
@@ -1780,6 +1780,7 @@ pcie4: pcie@...0000 {
 			reset-names = "pci";
 
 			power-domains = <&gcc PCIE_4_GDSC>;
+			required-opps = <&rpmhpd_opp_nom>;
 
 			phys = <&pcie4_phy>;
 			phy-names = "pciephy";
@@ -1878,6 +1879,7 @@ pcie3b: pcie@...8000 {
 			reset-names = "pci";
 
 			power-domains = <&gcc PCIE_3B_GDSC>;
+			required-opps = <&rpmhpd_opp_nom>;
 
 			phys = <&pcie3b_phy>;
 			phy-names = "pciephy";
@@ -1976,6 +1978,7 @@ pcie3a: pcie@...0000 {
 			reset-names = "pci";
 
 			power-domains = <&gcc PCIE_3A_GDSC>;
+			required-opps = <&rpmhpd_opp_nom>;
 
 			phys = <&pcie3a_phy>;
 			phy-names = "pciephy";
@@ -2077,6 +2080,7 @@ pcie2b: pcie@...8000 {
 			reset-names = "pci";
 
 			power-domains = <&gcc PCIE_2B_GDSC>;
+			required-opps = <&rpmhpd_opp_nom>;
 
 			phys = <&pcie2b_phy>;
 			phy-names = "pciephy";
@@ -2175,6 +2179,7 @@ pcie2a: pcie@...0000 {
 			reset-names = "pci";
 
 			power-domains = <&gcc PCIE_2A_GDSC>;
+			required-opps = <&rpmhpd_opp_nom>;
 
 			phys = <&pcie2a_phy>;
 			phy-names = "pciephy";
-- 
2.43.0