mirror of
https://github.com/Evolution-X-Devices/kernel_xiaomi_sm8450-devicetrees
synced 2026-02-01 08:51:30 +00:00
b0e5152a74
Add devicetree bindings snapshot to the devicetree project.
This snapshot is taken as of the
'commit 5fba1b18cfc72e264e5f3ce49020ed322aa6ac9f ("Merge 5.6-rc3
into android-mainline")' of the kernel project.
Change-Id: Ia087ab2b7d4a2616ea446a69683a8b5b821d0448
47 lines
1.4 KiB
Plaintext
47 lines
1.4 KiB
Plaintext
======================================================================
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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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