From: Jim Quinlan <jim2101024@xxxxxxxxx> This patchs adds the Device Tree bindings for the Broadcom STB PCIe root complex hardware. Signed-off-by: Jim Quinlan <jim2101024@xxxxxxxxx> Signed-off-by: Florian Fainelli <f.fainelli@xxxxxxxxx> --- .../devicetree/bindings/pci/brcm,brcmstb-pcie.txt | 81 ++++++++++++++++++++++ 1 file changed, 81 insertions(+) create mode 100644 Documentation/devicetree/bindings/pci/brcm,brcmstb-pcie.txt diff --git a/Documentation/devicetree/bindings/pci/brcm,brcmstb-pcie.txt b/Documentation/devicetree/bindings/pci/brcm,brcmstb-pcie.txt new file mode 100644 index 000000000000..922317969ab5 --- /dev/null +++ b/Documentation/devicetree/bindings/pci/brcm,brcmstb-pcie.txt @@ -0,0 +1,81 @@ +Brcmstb PCIe Host Controller Device Tree Bindings + +Introduction: + +The brcmstb host controller closely follows the example set in + + [1] http://devicetree.org/Device_Tree_Usage#PCI_Host_Bridge + +The rest of this document explains some added customizations and +offers an example Brcmstb PCIe host controller DT node. + +Required Properties: + reg -- the register start address and length for the PCIe block. + Additional start,length pairs may be specified for clock addresses. + interrupts -- this must be specified but it is used indirectly. Interrupt + zero must be specified; the Brcmstb driver code uses this interrupt + to determine the offset used for all interrupts, specifically, those + listed in interrupt-map. + compatible -- must be one of: "brcm,bcm7425-pcie", "brcm,bcm7435-pcie" or + "brcm,bcm7445-pcie". + #address-cells -- the number of address cells for PCI-space. + #size-cells -- the number of size cells for PCI-space. + ranges -- See [1]; a specification of the outbound windows for the host + controller. Each outbound window is described by a 7-tuple: + (3 entries) -- PCIe space start address (0th entry is ignored). + (2 entries) -- CPU/System start address + (2 entries) -- Size of region. + Due to hardware limitations, there may be a maximum of four windows + specified. + #interrupt-cells -- number of cells used to describe the interrupt. + interrupt-map -- See [1]; each interrupt requires 7 entries, and + currently all but the fifth entry (order 0) -- the interrupt + number -- is ignored. There must be four interrupts specified + for the PCI's INTA, INTB, INTC, and INTD. + +Optional Properties: + interrupt-names -- names of the interrupts listed in the interrupt map. + clocks -- list of clock phandles. If specified, this should list one + clock. + clock-names -- the "local" names of the clocks specified in 'clocks'. Note + that if the 'clocks' property is given, 'clock-names' is mandatory, + and the name of the clock is expected to be "sw_pcie". + brcm,ssc -- (boolean) indicates usage of spread-spectrum clocking. + brcm,gen -- (integer) indicates desired generation of link: + 1 => 2.5 Gbps, 2 => 5.0 Gbps, 3 => 8.0 Gbps. + supply-names -- the names of voltage regulators that the root + complex should turn off/on/on on suspend/resume/boot. This + is a string list. + supplies -- A collection of phandles to a regulator nodes, see + Documentation/devicetree/bindings/regulator/ for specific + bindings. The number and order of phandles must match + exactly the number of strings in the "supply-names" property. + +Example Node: + + pcie@f0460000 { + reg = <0x0 0xf0460000 0x0 0x9310>; + interrupts = <0x0 0x0 0x4>; + compatible = "brcm,pci-plat-dev"; + #address-cells = <3>; + #size-cells = <2>; + ranges = <0x02000000 0x00000000 0x00000000 0x00000000 0xc0000000 0x00000000 0x08000000 + 0x02000000 0x00000000 0x08000000 0x00000000 0xc8000000 0x00000000 0x08000000>; + #interrupt-cells = <1>; + interrupt-map-mask = <0xf800 0 0 7>; + interrupt-map = <0 0 0 1 &intc 47 3 + 0 0 0 2 &intc 48 3 + 0 0 0 3 &intc 49 3 + 0 0 0 4 &intc 50 3>; + interrupt-names = "pcie_0_inta", + "pcie_0_intb", + "pcie_0_intc", + "pcie_0_intd"; + clocks = <&sw_pcie0>; + clock-names = "sw_pcie"; + brcm,ssc; + brcm,gen = <1>; + supply-names = "vreg-wifi-pwr"; + supplies = <&vreg-wifi-pwr>; + + }; -- 2.1.0 -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
