From: Elad Nachman <enachman@xxxxxxxxxxx> Add properties to support configurable DMA mask bits and region mask bits. configurable DMA mask bits is needed for Marvell AC5/AC5X SOCs which have their physical DDR memory start at address 0x2_0000_0000. Configurable region mask bits is needed for the Marvell Armada 7020/7040/8040 SOCs when the DT file places the PCIe window above the 4GB region. The Synopsis Designware PCIe IP in these SOCs is too old to specify the highest memory location supported by the PCIe, but practically supports such locations. Allow these locations to be specified in the DT file. First DT property is called num-dmamask, and can range between 33 and 64. Second DT property is called num-regionmask, and can range between 33 and 64. Signed-off-by: Elad Nachman <enachman@xxxxxxxxxxx> --- .../devicetree/bindings/pci/snps,dw-pcie-common.yaml | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/Documentation/devicetree/bindings/pci/snps,dw-pcie-common.yaml b/Documentation/devicetree/bindings/pci/snps,dw-pcie-common.yaml index d87e13496834..a1b06ff19ca7 100644 --- a/Documentation/devicetree/bindings/pci/snps,dw-pcie-common.yaml +++ b/Documentation/devicetree/bindings/pci/snps,dw-pcie-common.yaml @@ -261,6 +261,16 @@ properties: dma-coherent: true + num-dmamask: + description: | + number of dma mask bits to use, if different than default 32 + maximum: 64 + + num-regionmask: + description: | + number of region limit mask bits to use, if different than default 32 + maximum: 64 + additionalProperties: true ... -- 2.17.1
