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--- Begin Message ---Hi! While adding support to LibreRouter v1 board, that has 2 mpci boards, I found two bugs on the definition of the pci resources that only arise when using both pci at the same time (none of the boards already supported in ath79 has 2 pci). These changes fix qca955x dual pci support in a backwards compatible way. Here are some dmesg of test runs applying these changes (over 0465e41e0532ae54c2018ddbfa01927a9b594769): Before the first patch, enabling pcie0 and pcie1: [ 0.131911] PCI host bridge /ahb/apb/pcie-controller@180c0000 ranges: [ 0.138778] MEM 0x0000000010000000..0x0000000013ffffff [ 0.144362] IO 0x0000000000000000..0x0000000000000000 [ 0.150229] PCI host bridge /ahb/apb/pcie-controller@18250000 ranges: [ 0.157120] MEM 0x0000000012000000..0x0000000013ffffff [ 0.162676] IO 0x0000000000000000..0x0000000000000000 [ 0.168238] Skipping PCI bus scan due to resource conflict [ 0.189522] PCI host bridge to bus 0000:00 After the first patch, the MEM addresses are ok but IO has conflicts: [ 0.131910] PCI host bridge /ahb/apb/pcie-controller@180c0000 ranges: [ 0.138770] MEM 0x0000000010000000..0x0000000011ffffff [ 0.144353] IO 0x0000000000000000..0x0000000000000000 [ 0.150224] PCI host bridge /ahb/apb/pcie-controller@18250000 ranges: [ 0.157119] MEM 0x0000000012000000..0x0000000013ffffff [ 0.162676] IO 0x0000000000000000..0x0000000000000000 [ 0.168238] Skipping PCI bus scan due to resource conflict After the second patch, all good: [ 0.131909] PCI host bridge /ahb/apb/pcie-controller@180c0000 ranges: [ 0.138770] MEM 0x0000000010000000..0x0000000011ffffff [ 0.144354] IO 0x0000000000000000..0x0000000000000000 [ 0.150220] PCI host bridge /ahb/apb/pcie-controller@18250000 ranges: [ 0.157112] MEM 0x0000000012000000..0x0000000013ffffff [ 0.162667] IO 0x0000000000000001..0x0000000000000001 [ 0.183692] PCI host bridge to bus 0000:00 [ 0.188058] pci_bus 0000:00: root bus resource [mem 0x10000000-0x11ffffff] [ 0.195405] pci_bus 0000:00: root bus resource [io 0x0000] [ 0.201334] pci_bus 0000:00: root bus resource [??? 0x00000000 flags 0x0] [ 0.208556] pci_bus 0000:00: No busn resource found for root bus, will use [bus 00-ff] [ 0.217397] pci 0000:00:00.0: BAR 0: assigned [mem 0x10000000-0x1001ffff 64bit] [ 0.225218] pci 0000:00:00.0: BAR 6: assigned [mem 0x10020000-0x1002ffff pref] [ 0.233021] PCI host bridge to bus 0000:01 [ 0.237403] pci_bus 0000:01: root bus resource [mem 0x12000000-0x13ffffff] [ 0.244710] pci_bus 0000:01: root bus resource [io 0x0001] [ 0.250640] pci_bus 0000:01: root bus resource [??? 0x00000000 flags 0x0] [ 0.257856] pci_bus 0000:01: No busn resource found for root bus, will use [bus 01-ff] [ 0.266688] pci 0000:01:00.0: BAR 0: assigned [mem 0x12000000-0x1201ffff 64bit] [ 0.274481] pci 0000:01:00.0: BAR 6: assigned [mem 0x12020000-0x1202ffff pref] Test with pcie0 disabled and pcie1 enabled (emulating some devices with only pcie1) The pcie1 bus is still numbered 0 so this patches shold be backwards compatible: [ 0.131920] PCI host bridge /ahb/apb/pcie-controller@18250000 ranges: [ 0.138787] MEM 0x0000000012000000..0x0000000013ffffff [ 0.144371] IO 0x0000000000000001..0x0000000000000001 [ 0.165180] PCI host bridge to bus 0000:00 [ 0.169544] pci_bus 0000:00: root bus resource [mem 0x12000000-0x13ffffff] [ 0.176891] pci_bus 0000:00: root bus resource [io 0x0001] [ 0.182818] pci_bus 0000:00: root bus resource [??? 0x00000000 flags 0x0] [ 0.190042] pci_bus 0000:00: No busn resource found for root bus, will use [bus 00-ff] [ 0.198881] pci 0000:00:00.0: BAR 0: assigned [mem 0x12000000-0x1201ffff 64bit] [ 0.206704] pci 0000:00:00.0: BAR 6: assigned [mem 0x12020000-0x1202ffff pref] Best, SAn PS: this is my first contribution to openwrt! Santiago Piccinini (2): ath79: fix qca955x pcie0 memory size ath79: fix qca955x dual pci resource allocation target/linux/ath79/dts/qca9557.dtsi | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) -- 2.20.1
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