PCI: iproc: Update PCIe device tree bindings

Update the device tree bindings with added support for outbound mapping
configurations.

Signed-off-by: Ray Jui <rjui@broadcom.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>

1 files changed, 20 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/pci/brcm,iproc-pcie.txt b/Documentation/devicetree/bindings/pci/brcm,iproc-pcie.txt
index f7ce50e38ed4..45c2a8094a9f 100644
--- a/Documentation/devicetree/bindings/pci/brcm,iproc-pcie.txt
+++ b/Documentation/devicetree/bindings/pci/brcm,iproc-pcie.txt
@@ -17,6 +17,21 @@ Optional properties:
 - phys: phandle of the PCIe PHY device
 - phy-names: must be "pcie-phy"
 
+- brcm,pcie-ob: Some iProc SoCs do not have the outbound address mapping done
+by the ASIC after power on reset. In this case, SW needs to configure it
+
+If the brcm,pcie-ob property is present, the following properties become
+effective:
+
+Required:
+- brcm,pcie-ob-axi-offset: The offset from the AXI address to the internal
+address used by the iProc PCIe core (not the PCIe address)
+- brcm,pcie-ob-window-size: The outbound address mapping window size (in MB)
+
+Optional:
+- brcm,pcie-ob-oarr-size: Some iProc SoCs need the OARR size bit to be set to
+increase the outbound window size
+
 Example:
         pcie0: pcie@18012000 {
                 compatible = "brcm,iproc-pcie";
@@ -38,6 +53,11 @@ Example:
 
                 phys = <&phy 0 5>;
                 phy-names = "pcie-phy";
+
+                brcm,pcie-ob;
+                brcm,pcie-ob-oarr-size;
+                brcm,pcie-ob-axi-offset = <0x00000000>;
+                brcm,pcie-ob-window-size = <256>;
         };
 
         pcie1: pcie@18013000 {