ARM: dts: dra7: Add "dma-ranges" property to PCIe RC DT nodes
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Message ID 20200128064147.18276-1-kishon@ti.com
State New
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Series
  • ARM: dts: dra7: Add "dma-ranges" property to PCIe RC DT nodes
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Commit Message

Kishon Vijay Abraham I Jan. 28, 2020, 6:41 a.m. UTC
'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>
---
 arch/arm/boot/dts/dra7.dtsi | 2 ++
 1 file changed, 2 insertions(+)

Comments

Tony Lindgren Feb. 26, 2020, 6:36 p.m. UTC | #1
* Kishon Vijay Abraham I <kishon@ti.com> [200127 22:39]:
> '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.

Sorry looks like I missed this fix earlier, applying into fixes.

Thanks,

Tony

Patch
diff mbox series

diff --git a/arch/arm/boot/dts/dra7.dtsi b/arch/arm/boot/dts/dra7.dtsi
index 73e5011f531a..c5af7530be7c 100644
--- a/arch/arm/boot/dts/dra7.dtsi
+++ b/arch/arm/boot/dts/dra7.dtsi
@@ -184,6 +184,7 @@ 
 				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>;
@@ -238,6 +239,7 @@ 
 				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>;