Hi,all. I have confused for pci section in dts file some days.And I have searched open firmware or device tree in goole.But little found.So I send this mail and want to know some details about device tree source file,such as ethernet link or docments. Now I have a customed pci video card ,which is based on fujitsu mb86297 chip.I want to make it work on Windrver SBC8548E eval board.I have ported u-boot and it works well.But when I run linux on eval board,linux can't probe mb86297 chip.Below is pci section of dts file: [EMAIL PROTECTED] { interrupt-map-mask = <f800 0 0 7>; interrupt-map = <
/* IDSEL 0x11 AD17*/ 8800 0 0 1 &mpic 2 1 8800 0 0 2 &mpic 3 1 8800 0 0 3 &mpic 4 1 8800 0 0 4 &mpic 5 1>; interrupt-parent = <&mpic>; interrupts = <19 2>; bus-range = <0 0>; ranges = <02000000 0 90000000 90000000 0 10000000 01000000 0 00000000 e2800000 0 00800000>; clock-frequency = <3f940aa>; #interrupt-cells = <1>; #size-cells = <2>; #address-cells = <3>; reg = <8000 1000>; compatible = "fsl,mpc8540-pci"; device_type = "pci"; }; I guess which refer to host-pci bridge ATMU,is right?But how to descripe added-on pci chip,whose BAR0 and BAR1 are IO spaces, BAR2 and BAR3 are MEM spaces. Below is fragment of linux boot info: ...... mpc85xx_cds_setup_arch() CDS Version = 0xf8 in slot 4 Found FSL PCI host bridge at 0x00000000e0008000.Firmware bus number: 0->0 PCI: MEM[0] 0x80000000 -> 0x9fffffff PCI: IO 0x0 -> 0x7fffff arch: exit Zone PFN ranges: DMA 0 -> 65536 Normal 65536 -> 65536 Movable zone start PFN for each node early_node_map[1] active PFN ranges 0: 0 -> 65536 Built 1 zonelists in Zone order. Total pages: 65024 Kernel command line: root=/dev/ram rw console=ttyS1,57600 mpic: Setting up MPIC " OpenPIC " version 1.2 at e0040000, max 1 CPUs mpic: ISU size: 80, shift: 7, mask: 7f mpic: Initializing for 80 sources PID hash table entries: 1024 (order: 10, 4096 bytes) Dentry cache hash table entries: 32768 (order: 5, 131072 bytes) Inode-cache hash table entries: 16384 (order: 4, 65536 bytes) Memory: 250044k/262144k available (3364k kernel code, 11776k reserved, 124k data, 119k bss, 164k init) Mount-cache hash table entries: 512 NET: Registered protocol family 16 PCI: Probing PCI hardware pci_busdev_to_OF_node(0,0x0) parent is /[EMAIL PROTECTED]/[EMAIL PROTECTED] result is <NULL> PCI->OF bus map: 0 -> 0 PCI: bridge rsrc 0..7fffff (100), parent c034d33c PCI: bridge rsrc 80000000..9fffffff (1200), parent c034d358 ........ Hope advice,Thank you advance. -- View this message in context: http://www.nabble.com/how-to-understand-pci-section-in-device-tree-source-file-tp18070474p18070474.html Sent from the linuxppc-embedded mailing list archive at Nabble.com. _______________________________________________ Linuxppc-embedded mailing list Linuxppc-embedded@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-embedded