linux-kernel - [PATCH AUTOSEL 6.6 05/12] arm64: dts: qcom: sc8280xp-crd: limit pcie4 link speed

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Message-ID: <20240311183727.328187-5-sashal@kernel.org>
Date: Mon, 11 Mar 2024 14:37:19 -0400
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org,
	stable@...r.kernel.org
Cc: Johan Hovold <johan+linaro@...nel.org>,
	Konrad Dybcio <konrad.dybcio@...aro.org>,
	Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>,
	Bjorn Andersson <andersson@...nel.org>,
	Sasha Levin <sashal@...nel.org>,
	andy.gross@...aro.org,
	david.brown@...aro.org,
	robh+dt@...nel.org,
	mark.rutland@....com,
	linux-arm-msm@...r.kernel.org,
	linux-soc@...r.kernel.org,
	devicetree@...r.kernel.org
Subject: [PATCH AUTOSEL 6.6 05/12] arm64: dts: qcom: sc8280xp-crd: limit pcie4 link speed

From: Johan Hovold <johan+linaro@...nel.org>

[ Upstream commit db8138845cebcdd0c709570b8217bd052757b8df ]

Limit the WiFi PCIe link speed to Gen2 speed (500 MB/s), which is the
speed that Windows uses.

Signed-off-by: Johan Hovold <johan+linaro@...nel.org>
Reviewed-by: Konrad Dybcio <konrad.dybcio@...aro.org>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
Link: https://lore.kernel.org/r/20240223152124.20042-7-johan+linaro@kernel.org
Signed-off-by: Bjorn Andersson <andersson@...nel.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 arch/arm64/boot/dts/qcom/sc8280xp-crd.dts | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/sc8280xp-crd.dts b/arch/arm64/boot/dts/qcom/sc8280xp-crd.dts
index ffc4406422ae2..41215567b3aed 100644
--- a/arch/arm64/boot/dts/qcom/sc8280xp-crd.dts
+++ b/arch/arm64/boot/dts/qcom/sc8280xp-crd.dts
@@ -563,6 +563,8 @@
 };
 
 &pcie4 {
+	max-link-speed = <2>;
+
 	perst-gpios = <&tlmm 141 GPIO_ACTIVE_LOW>;
 	wake-gpios = <&tlmm 139 GPIO_ACTIVE_LOW>;
 
-- 
2.43.0