The main intention of this series is to move wake# to the root port node. After this series we will come up with a patch which registers for wake IRQ from the pcieport driver. The wake IRQ is needed for the endpoint to wakeup the host from D3cold. The driver change for wake IRQ is posted here[1]. There are many places we agreed to move the wake and perst gpio's and phy etc to the pcie root port node instead of bridge node[2] as the these properties are root port specific and does not belongs to bridge node. So move the phy, phy-names, wake-gpio's in the root port. There is already reset-gpio defined for PERST# in pci-bus-common.yaml, start using that property instead of perst-gpio. For backward compatibility, don't remove any existing properties in the bridge node. There are some other properties like num-lanes, max-link-speed which needs to be moved to the root port nodes, but in this series we are excluding them for now as this requires more changes in dwc layer and can complicate the things. Once this series gets merged all other platforms also will be updated to use this new way. Note:- The driver change needs to be merged first before dts changes. Krzysztof Wilczyński or Mani can you provide the immutable branch with these PCIe changes. [1] https://lore.kernel.org/all/20250401-wake_irq_support-v1-0-d2e22f4a0efd@xxxxxxxxxxxxxxxx/ [2] https://lore.kernel.org/linux-pci/20241211192014.GA3302752@bhelgaas/ Signed-off-by: Krishna Chaitanya Chundru <krishna.chundru@xxxxxxxxxxxxxxxx> --- Changes in v3: - Make old properties as deprecated, update commit message (Dmitry) - Add helper functions wherever both multiport and legacy methods are used. (Mani) - Link to v2: https://lore.kernel.org/r/20250414-perst-v2-0-89247746d755@xxxxxxxxxxxxxxxx Changes in v2: - Remove phy-names property and change the driver, dtsi accordingly (Rob) - Link to v1: https://lore.kernel.org/r/20250322-perst-v1-0-e5e4da74a204@xxxxxxxxxxxxxxxx --- Krishna Chaitanya Chundru (3): dt-bindings: PCI: qcom: Move phy, wake & reset gpio's to root port PCI: qcom: Add support for multi-root port arm64: qcom: sc7280: Move phy, perst to root port node .../devicetree/bindings/pci/qcom,pcie-common.yaml | 36 ++++- .../devicetree/bindings/pci/qcom,pcie-sc7280.yaml | 16 +- arch/arm64/boot/dts/qcom/qcs6490-rb3gen2.dts | 5 +- arch/arm64/boot/dts/qcom/sc7280-herobrine.dtsi | 5 +- arch/arm64/boot/dts/qcom/sc7280-idp.dtsi | 5 +- arch/arm64/boot/dts/qcom/sc7280.dtsi | 6 +- drivers/pci/controller/dwc/pcie-qcom.c | 169 +++++++++++++++++---- 7 files changed, 202 insertions(+), 40 deletions(-) --- base-commit: cfb2e2c57aef75a414c0f18445c7441df5bc13be change-id: 20250101-perst-cb885b5a6129 Best regards, -- Krishna Chaitanya Chundru <krishna.chundru@xxxxxxxxxxxxxxxx>
