[PATCH v5 3/3] arm64: dts: qcom: lemans: Add PCIe lane equalization preset properties
From: Ziyue Zhang <hidden>
Date: 2025-08-19 07:17:10
Also in:
linux-arm-msm, linux-pci, linux-phy, lkml
Subsystem:
arm/qualcomm mailing list, arm/qualcomm support, the rest · Maintainers:
Bjorn Andersson, Konrad Dybcio, Linus Torvalds
Add PCIe lane equalization preset properties with all values set to 5 for 8.0 GT/s and 16.0 GT/s data rates to enhance link stability. Co-developed-by: Qiang Yu <redacted> Signed-off-by: Qiang Yu <redacted> Signed-off-by: Ziyue Zhang <redacted> Reviewed-by: Konrad Dybcio <redacted> Acked-by: Manivannan Sadhasivam <mani@kernel.org> --- arch/arm64/boot/dts/qcom/lemans.dtsi | 7 +++++++ 1 file changed, 7 insertions(+)
diff --git a/arch/arm64/boot/dts/qcom/lemans.dtsi b/arch/arm64/boot/dts/qcom/lemans.dtsi
index 64f5378c6a47..c7a09c3605a7 100644
--- a/arch/arm64/boot/dts/qcom/lemans.dtsi
+++ b/arch/arm64/boot/dts/qcom/lemans.dtsi@@ -7657,6 +7657,10 @@ pcie0: pcie@1c00000 { phys = <&pcie0_phy>; phy-names = "pciephy"; + eq-presets-8gts = /bits/ 16 <0x5555 0x5555>; + eq-presets-16gts = /bits/ 8 <0x55 0x55>; + + status = "disabled"; pcieport0: pcie@0 {
@@ -7827,6 +7831,9 @@ pcie1: pcie@1c10000 { phys = <&pcie1_phy>; phy-names = "pciephy"; + eq-presets-8gts = /bits/ 16 <0x5555 0x5555 0x5555 0x5555>; + eq-presets-16gts = /bits/ 8 <0x55 0x55 0x55 0x55>; + status = "disabled"; pcie@0 {
--
2.43.0