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46 lines
1.4 KiB
46 lines
1.4 KiB
====================================================================== |
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Device tree bindings for Aspeed AST2400/AST2500 PCI-to-AHB Bridge Control Driver |
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====================================================================== |
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The bridge is available on platforms with the VGA enabled on the Aspeed device. |
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In this case, the host has access to a 64KiB window into all of the BMC's |
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memory. The BMC can disable this bridge. If the bridge is enabled, the host |
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has read access to all the regions of memory, however the host only has read |
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and write access depending on a register controlled by the BMC. |
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Required properties: |
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=================== |
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- compatible: must be one of: |
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- "aspeed,ast2400-p2a-ctrl" |
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- "aspeed,ast2500-p2a-ctrl" |
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Optional properties: |
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=================== |
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- reg: A hint for the memory regions associated with the P2A controller |
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- memory-region: A phandle to a reserved_memory region to be used for the PCI |
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to AHB mapping |
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The p2a-control node should be the child of a syscon node with the required |
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property: |
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- compatible : Should be one of the following: |
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"aspeed,ast2400-scu", "syscon", "simple-mfd" |
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"aspeed,ast2500-scu", "syscon", "simple-mfd" |
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Example |
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=================== |
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g4 Example |
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---------- |
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syscon: scu@1e6e2000 { |
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compatible = "aspeed,ast2400-scu", "syscon", "simple-mfd"; |
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reg = <0x1e6e2000 0x1a8>; |
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p2a: p2a-control { |
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compatible = "aspeed,ast2400-p2a-ctrl"; |
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memory-region = <&reserved_memory>; |
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}; |
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};
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