FROMGIT: arm64: dts: qcom: hamoa: Fix incomplete Root Port property migration#571
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…igration Historically, the Qualcomm PCIe controller node (Host bridge) described all Root Port properties, such as PHY, PERST#, and WAKE#. But to provide a more accurate hardware description and to support future multi-Root Port controllers, these properties were moved to the Root Port node in the devicetree bindings. Commit 960609b ("arm64: dts: qcom: hamoa: Move PHY, PERST, and Wake GPIOs to PCIe port nodes and add port Nodes for all PCIe ports") initiated this transition for the Hamoa platform by moving the PHY property to the Root Port node in hamoa.dtsi. However, it only updated some platform specific DTS files for PERST# and WAKE#, leaving others in a "mixed" binding state. While the PCIe controller driver supports both legacy and Root Port bindings, It cannot correctly handle a mix of both. In these cases, the driver parses the PHY from the Root Port node, but fails to find the PERST# property (which it then assumes is not present, as it is optional). Consequently, the controller probe succeeds, but PERST# remains uncontrolled, preventing PCIe endpoints from functioning. So, fix the incomplete migration by moving the PERST# and WAKE# properties from the controller node to the Root Port node in all remaining Hamoa platform DTS files. Fixes: 960609b ("arm64: dts: qcom: hamoa: Move PHY, PERST, and Wake GPIOs to PCIe port nodes and add port Nodes for all PCIe ports") Signed-off-by: Ziyue Zhang <ziyue.zhang@oss.qualcomm.com> Reviewed-by: Manivannan Sadhasivam <mani@kernel.org> Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com> Link: https://lore.kernel.org/r/20260330020934.3501247-1-ziyue.zhang@oss.qualcomm.com Signed-off-by: Bjorn Andersson <andersson@kernel.org>
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shashim-quic
approved these changes
May 12, 2026
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Historically, the Qualcomm PCIe controller node (Host bridge) described all Root Port properties, such as PHY, PERST#, and WAKE#. But to provide a more accurate hardware description and to support future multi-Root Port controllers, these properties were moved to the Root Port node in the devicetree bindings.
Commit 960609b ("arm64: dts: qcom: hamoa: Move PHY, PERST, and Wake GPIOs to PCIe port nodes and add port Nodes for all PCIe ports") initiated this transition for the Hamoa platform by moving the PHY property to the Root Port node in hamoa.dtsi. However, it only updated some platform specific DTS files for PERST# and WAKE#, leaving others in a "mixed" binding state.
While the PCIe controller driver supports both legacy and Root Port bindings, It cannot correctly handle a mix of both. In these cases, the driver parses the PHY from the Root Port node, but fails to find the PERST# property (which it then assumes is not present, as it is optional). Consequently, the controller probe succeeds, but PERST# remains uncontrolled, preventing PCIe endpoints from functioning.
So, fix the incomplete migration by moving the PERST# and WAKE# properties from the controller node to the Root Port node in all remaining Hamoa platform DTS files.
Fixes: 960609b ("arm64: dts: qcom: hamoa: Move PHY, PERST, and Wake GPIOs to PCIe port nodes and add port Nodes for all PCIe ports")
Reviewed-by: Manivannan Sadhasivam mani@kernel.org
Reviewed-by: Konrad Dybcio konrad.dybcio@oss.qualcomm.com
Link: https://lore.kernel.org/r/20260330020934.3501247-1-ziyue.zhang@oss.qualcomm.com
CRs-Fixed: 4533083