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    Subject[PATCH 4.19 04/65] ARM: dts: dra7: Add "dma-ranges" property to PCIe RC DT nodes
    Date
    From: Kishon Vijay Abraham I <kishon@ti.com>

    [ Upstream commit 27f13774654ea6bd0b6fc9b97cce8d19e5735661 ]

    'dma-ranges' in a PCI bridge node does correctly set dma masks for PCI
    devices not described in the DT. Certain DRA7 platforms (e.g., DRA76)
    has RAM above 32-bit boundary (accessible with LPAE config) though the
    PCIe bridge will be able to access only 32-bits. Add 'dma-ranges'
    property in PCIe RC DT nodes to indicate the host bridge can access
    only 32 bits.

    Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
    Signed-off-by: Tony Lindgren <tony@atomide.com>
    Signed-off-by: Sasha Levin <sashal@kernel.org>
    ---
    arch/arm/boot/dts/dra7.dtsi | 2 ++
    1 file changed, 2 insertions(+)

    diff --git a/arch/arm/boot/dts/dra7.dtsi b/arch/arm/boot/dts/dra7.dtsi
    index 7ce24b282d421..c1ef3201950ae 100644
    --- a/arch/arm/boot/dts/dra7.dtsi
    +++ b/arch/arm/boot/dts/dra7.dtsi
    @@ -324,6 +324,7 @@
    device_type = "pci";
    ranges = <0x81000000 0 0 0x03000 0 0x00010000
    0x82000000 0 0x20013000 0x13000 0 0xffed000>;
    + dma-ranges = <0x02000000 0x0 0x00000000 0x00000000 0x1 0x00000000>;
    bus-range = <0x00 0xff>;
    #interrupt-cells = <1>;
    num-lanes = <1>;
    @@ -376,6 +377,7 @@
    device_type = "pci";
    ranges = <0x81000000 0 0 0x03000 0 0x00010000
    0x82000000 0 0x30013000 0x13000 0 0xffed000>;
    + dma-ranges = <0x02000000 0x0 0x00000000 0x00000000 0x1 0x00000000>;
    bus-range = <0x00 0xff>;
    #interrupt-cells = <1>;
    num-lanes = <1>;
    --
    2.20.1


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