Document the PCIe device tree binding for Broadcom iProc family of SoCs
Signed-off-by: Ray Jui <rjui@xxxxxxxxxxxx>
Reviewed-by: Scott Branden <sbranden@xxxxxxxxxxxx>
---
.../devicetree/bindings/pci/brcm,iproc-pcie.txt | 62 ++++++++++++++++++++
1 file changed, 62 insertions(+)
create mode 100644 Documentation/devicetree/bindings/pci/brcm,iproc-pcie.txt
diff --git a/Documentation/devicetree/bindings/pci/brcm,iproc-pcie.txt b/Documentation/devicetree/bindings/pci/brcm,iproc-pcie.txt
new file mode 100644
index 0000000..2467628
--- /dev/null
+++ b/Documentation/devicetree/bindings/pci/brcm,iproc-pcie.txt
@@ -0,0 +1,62 @@
+* Broadcom iProc PCIe controller
+
+Required properties:
+- compatible: Must be "brcm,iproc-pcie"
+- reg: base address and length of the PCIe controller and the MDIO interface
+ that controls the PCIe PHY
+- interrupts: interrupt IDs
+- bus-range: PCI bus numbers covered
+- #address-cells: set to <3>
+- #size-cells: set to <2>
+- device_type: set to "pci"
+- ranges: ranges for the PCI memory and I/O regions
+- phy-addr: MDC/MDIO adddress of the PCIe PHY
+- have-msi-inten-reg: Required for legacy iProc PCIe controllers that need the
+ MSI interrupt enable register to be set explicitly
+
+The Broadcom iProc PCie driver adapts the multi-domain structure, i.e., each
+interface has its own domain and therefore has its own device node
+Example:
+
+SoC specific DT Entry:
+
+ pcie0: pcie@18012000 {
+ compatible = "brcm,iproc-pcie";
+ reg = <0x18012000 0x1000>,
+ <0x18002000 0x1000>;
+ interrupts = <GIC_SPI 96 IRQ_TYPE_NONE>,
+ <GIC_SPI 97 IRQ_TYPE_NONE>,
+ <GIC_SPI 98 IRQ_TYPE_NONE>,
+ <GIC_SPI 99 IRQ_TYPE_NONE>,
+ <GIC_SPI 100 IRQ_TYPE_NONE>,
+ <GIC_SPI 101 IRQ_TYPE_NONE>;
+ bus-range = <0x00 0xFF>;
+
+ #address-cells = <3>;
+ #size-cells = <2>;
+ device_type = "pci";
+ ranges = <0x81000000 0 0 0x28000000 0 0x00010000 /* downstream I/O */
+ 0x82000000 0 0x20000000 0x20000000 0 0x04000000>; /* non-prefetchable memory */
+ phy-addr = <5>;
+ };
+
+ pcie1: pcie@18013000 {
+ compatible = "brcm,iproc-pcie";
+ reg = <0x18013000 0x1000>,
+ <0x18002000 0x1000>;
+
+ interrupts = <GIC_SPI 102 IRQ_TYPE_NONE>,
+ <GIC_SPI 103 IRQ_TYPE_NONE>,
+ <GIC_SPI 104 IRQ_TYPE_NONE>,
+ <GIC_SPI 105 IRQ_TYPE_NONE>,
+ <GIC_SPI 106 IRQ_TYPE_NONE>,
+ <GIC_SPI 107 IRQ_TYPE_NONE>;
+ bus-range = <0x00 0xFF>;
+
+ #address-cells = <3>;
+ #size-cells = <2>;
+ device_type = "pci";
+ ranges = <0x81000000 0 0 0x48000000 0 0x00010000 /* downstream I/O */
+ 0x82000000 0 0x40000000 0x40000000 0 0x04000000>; /* non-prefetchable memory */
+ phy-addr = <6>;
+ };
--
1.7.9.5
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