On Tue, Aug 15, 2023 at 10:19:57AM -0700, Lizhi Hou wrote: > The PCI endpoint device such as Xilinx Alveo PCI card maps the register > spaces from multiple hardware peripherals to its PCI BAR. Normally, > the PCI core discovers devices and BARs using the PCI enumeration process. > There is no infrastructure to discover the hardware peripherals that are > present in a PCI device, and which can be accessed through the PCI BARs. > > Apparently, the device tree framework requires a device tree node for the > PCI device. Thus, it can generate the device tree nodes for hardware > peripherals underneath. Because PCI is self discoverable bus, there might > not be a device tree node created for PCI devices. Furthermore, if the PCI > device is hot pluggable, when it is plugged in, the device tree nodes for > its parent bridges are required. Add support to generate device tree node > for PCI bridges. > > Add an of_pci_make_dev_node() interface that can be used to create device > tree node for PCI devices. > > Add a PCI_DYNAMIC_OF_NODES config option. When the option is turned on, > the kernel will generate device tree nodes for PCI bridges unconditionally. > > Initially, add the basic properties for the dynamically generated device > tree nodes which include #address-cells, #size-cells, device_type, > compatible, ranges, reg. > > Acked-by: Bjorn Helgaas <bhelgaas@xxxxxxxxxx> > Signed-off-by: Lizhi Hou <lizhi.hou@xxxxxxx> This patch results in the following build error. Building sparc64:allmodconfig ... failed -------------- Error log: <stdin>:1519:2: warning: #warning syscall clone3 not implemented [-Wcpp] sparc64-linux-ld: drivers/pci/of_property.o: in function `of_pci_prop_intr_map': of_property.c:(.text+0xc4): undefined reference to `of_irq_parse_raw' Guenter
