Thread (17 messages) 17 messages, 4 authors, 6d ago
COOLING6d

[PATCH 6/8] arm64: dts: qcom: talos: Add t-power-on-us property for PCIe root port

From: Krishna Chaitanya Chundru <hidden>
Date: 2026-09-11 06:50:40
Also in: linux-arm-msm, lkml
Subsystem: arm/qualcomm mailing list, arm/qualcomm support, the rest · Maintainers: Bjorn Andersson, Konrad Dybcio, Linus Torvalds

Currently the PCIe controller is not programming the T_POWER_ON value,
which can result in improper L1.2 exit behavior. Add the
t-power-on-us property to the PCIe root port so that this value is
correctly programmed during host initialization.

Signed-off-by: Krishna Chaitanya Chundru <redacted>
---
 arch/arm64/boot/dts/qcom/talos.dtsi | 2 ++
 1 file changed, 2 insertions(+)
diff --git a/arch/arm64/boot/dts/qcom/talos.dtsi b/arch/arm64/boot/dts/qcom/talos.dtsi
index eedfdce3c479..ceb1dfc5189d 100644
--- a/arch/arm64/boot/dts/qcom/talos.dtsi
+++ b/arch/arm64/boot/dts/qcom/talos.dtsi
@@ -1401,6 +1401,8 @@ pcie_port0: pcie@0 {
 				#size-cells = <2>;
 				ranges;
 				bus-range = <0x01 0xff>;
+
+				t-power-on-us = <80>;
 			};
 		};
 
-- 
2.34.1
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