linux-kernel - [PATCH v5 3/3] arm64: dts: qcom: lemans: Add PCIe lane equalization preset properties

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20250819071649.1531437-4-ziyue.zhang@oss.qualcomm.com>
Date: Tue, 19 Aug 2025 15:16:48 +0800
From: Ziyue Zhang <ziyue.zhang@....qualcomm.com>
To: andersson@...nel.org, konradybcio@...nel.org, robh@...nel.org,
        krzk+dt@...nel.org, conor+dt@...nel.org, jingoohan1@...il.com,
        mani@...nel.org, lpieralisi@...nel.org, kwilczynski@...nel.org,
        bhelgaas@...gle.com, johan+linaro@...nel.org, vkoul@...nel.org,
        kishon@...nel.org, neil.armstrong@...aro.org, abel.vesa@...aro.org,
        kw@...ux.com
Cc: linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-pci@...r.kernel.org,
        linux-phy@...ts.infradead.org, qiang.yu@....qualcomm.com,
        quic_krichai@...cinc.com, quic_vbadigan@...cinc.com,
        Ziyue Zhang <ziyue.zhang@....qualcomm.com>,
        Konrad Dybcio <konrad.dybcio@....qualcomm.com>
Subject: [PATCH v5 3/3] arm64: dts: qcom: lemans: Add PCIe lane equalization preset properties

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 <qiang.yu@....qualcomm.com>
Signed-off-by: Qiang Yu <qiang.yu@....qualcomm.com>
Signed-off-by: Ziyue Zhang <ziyue.zhang@....qualcomm.com>
Reviewed-by: Konrad Dybcio <konrad.dybcio@....qualcomm.com>
Acked-by: Manivannan Sadhasivam <mani@...nel.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@...0000 {
 		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@...0000 {
 		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