Add description for optional device tree property 'dma-ranges' for inbound mapping
Signed-off-by: Oza Oza <oza....@broadcom.com> Signed-off-by: Ray Jui <ray....@broadcom.com> Reviewed-by: Scott Branden <scott.bran...@broadcom.com> --- Documentation/devicetree/bindings/pci/brcm,iproc-pcie.txt | 3 +++ 1 file changed, 3 insertions(+) diff --git a/Documentation/devicetree/bindings/pci/brcm,iproc-pcie.txt b/Documentation/devicetree/bindings/pci/brcm,iproc-pcie.txt index f827b8d..62a0ab9 100644 --- a/Documentation/devicetree/bindings/pci/brcm,iproc-pcie.txt +++ b/Documentation/devicetree/bindings/pci/brcm,iproc-pcie.txt @@ -25,6 +25,9 @@ Optional properties: - phys: phandle of the PCIe PHY device - phy-names: must be "pcie-phy" - dma-coherent: present if DMA operations are coherent +- dma-ranges: Some PAXB based root complexes do not have inbound mapping done + by the ASIC after power on reset. In this case, SW is required to configure +the mapping, based on inbound memory regions specified by this property - 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 -- 2.1.4
