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Previously pme_turn_off() implement by platform related special register to trigge it. But Yoshihiro give good idea by using iATU to send out message. Previously Yoshihiro provide patches to raise INTx message by dummy write to outbound iATU. Use similar mathod to send out pme_turn_off message. Previous two patches is picked from Yoshihiro' big patch serialise. PCI: dwc: Change arguments of dw_pcie_prog_outbound_atu() PCI: Add INTx Mechanism Messages macros PCI: Add PME_TURN_OFF message macro dt-bindings: PCI: dwc: Add 'msg" register region, Add "msg" region to use to map PCI msg. PCI: dwc: Add common pme_turn_off message method Using common pme_turn_off() message if platform have not define their. Signed-off-by: Frank Li --- Changes in v2: - Add my sign off at PCI: dwc: Add outbound MSG TLPs support - Add Bjorn review tag at Add INTx Mechanism Messages macros - using PME_Turn_Off match PCIe spec - ref to pcie spec v6.1 - using section number. - Link to v1: https://lore.kernel.org/r/20240130-pme_msg-v1-0-d52b0add5c7c@nxp.com --- Frank Li (3): PCI: Add PME_TURN_OFF message macro dt-bindings: PCI: dwc: Add 'msg" register region PCI: dwc: Add common send PME_Turn_Off message method Yoshihiro Shimoda (3): PCI: Add INTx Mechanism Messages macros PCI: dwc: Consolidate args of dw_pcie_prog_outbound_atu() into a structure PCI: dwc: Add outbound MSG TLPs support .../devicetree/bindings/pci/snps,dw-pcie.yaml | 4 + drivers/pci/controller/dwc/pcie-designware-ep.c | 21 +++-- drivers/pci/controller/dwc/pcie-designware-host.c | 103 +++++++++++++++++---- drivers/pci/controller/dwc/pcie-designware.c | 62 ++++++------- drivers/pci/controller/dwc/pcie-designware.h | 22 ++++- drivers/pci/pci.h | 20 ++++ 6 files changed, 168 insertions(+), 64 deletions(-) --- base-commit: e08fc59eee9991afa467d406d684d46d543299a9 change-id: 20240130-pme_msg-dd2d81ee9886 Best regards,