On Thu, May 29, 2025 at 10:10:23AM +0800, Hans Zhang wrote: > This patch series extends PCIe Gen5/Gen6 support for the max-link-speed > property across device tree bindings and kernel validation logic. > > With PCIe 6.0 now supported in the Linux kernel and industry IP providers > like Synopsys/Cadence offering PCIe 6.0-compatible IPs, existing device > tree bindings and checks for max-link-speed (limited to Gen1~Gen4) no > longer align with hardware capabilities. > > Documentation updates: > > Patch 1/3 extends the PCI host controller binding (pci-bus-common.yaml) to > explicitly include Gen5/Gen6. > > Patch 2/3 updates the PCI endpoint binding (pci-ep.yaml) with the same > extension. > > Kernel validation fix: > > Patch 3/3 relaxes the max-link-speed check in of_pci_get_max_link_speed() > to accept values up to 6, ensuring compatibility with newer generations. > > These changes ensure that device tree configurations for modern PCIe > controllers (e.g., Synopsys/Cadence IP-based designs) can fully utilize > Gen5/Gen6 speeds without DT validation errors. > > --- > In my impression, they have already obtained the relevant certifications. > > e.g.: > Synopsys: > https://www.synopsys.com/dw/ipdir.php?ds=dwc_pcie6_controller > > Cadence: > https://www.cadence.com/en_US/home/tools/silicon-solutions/protocol-ip/pcie-and-compute-express-link/controller-for-pcie-and-cxl/controller-for-pcie.html > --- > > --- > Changes for v2: > - The following files have been deleted: > Documentation/devicetree/bindings/pci/pci.txt > > Update to this file again: > dtschema/schemas/pci/pci-bus-common.yaml > --- > > Hans Zhang (3): > dt-bindings: PCI: Extend max-link-speed to support PCIe Gen5/Gen6 > dt-bindings: PCI: pci-ep: Extend max-link-speed to PCIe Gen5/Gen6 Applied patch 2 to pci/dt-bindings, thanks! - Mani > PCI: of: Relax max-link-speed check to support PCIe Gen5/Gen6 > > dtschema/schemas/pci/pci-bus-common.yaml | 2 +- > Documentation/devicetree/bindings/pci/pci.txt | 5 +++-- > drivers/pci/of.c | 2 +- > 3 files changed, 5 insertions(+), 4 deletions(-) > > > base-commit: fee3e843b309444f48157e2188efa6818bae85cf > -- > 2.25.1 > -- மணிவண்ணன் சதாசிவம்
