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Diffstat (limited to 'Documentation/devicetree/bindings/bus/bcma.txt')
-rw-r--r-- | Documentation/devicetree/bindings/bus/bcma.txt | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/bus/bcma.txt b/Documentation/devicetree/bindings/bus/bcma.txt new file mode 100644 index 000000000000..62a48348ac15 --- /dev/null +++ b/Documentation/devicetree/bindings/bus/bcma.txt @@ -0,0 +1,32 @@ +Driver for ARM AXI Bus with Broadcom Plugins (bcma) + +Required properties: + +- compatible : brcm,bus-axi + +- reg : iomem address range of chipcommon core + +The cores on the AXI bus are automatically detected by bcma with the +memory ranges they are using and they get registered afterwards. + +The top-level axi bus may contain children representing attached cores +(devices). This is needed since some hardware details can't be auto +detected (e.g. IRQ numbers). Also some of the cores may be responsible +for extra things, e.g. ChipCommon providing access to the GPIO chip. + +Example: + + axi@18000000 { + compatible = "brcm,bus-axi"; + reg = <0x18000000 0x1000>; + ranges = <0x00000000 0x18000000 0x00100000>; + #address-cells = <1>; + #size-cells = <1>; + + chipcommon { + reg = <0x00000000 0x1000>; + + gpio-controller; + #gpio-cells = <2>; + }; + }; |