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| -rw-r--r-- | Documentation/devicetree/bindings/csky/cpus.txt | 73 |
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diff --git a/Documentation/devicetree/bindings/csky/cpus.txt b/Documentation/devicetree/bindings/csky/cpus.txt new file mode 100644 index 000000000..ae79412f2 --- /dev/null +++ b/Documentation/devicetree/bindings/csky/cpus.txt @@ -0,0 +1,73 @@ +================== +C-SKY CPU Bindings +================== + +The device tree allows to describe the layout of CPUs in a system through +the "cpus" node, which in turn contains a number of subnodes (ie "cpu") +defining properties for every cpu. + +Only SMP system need to care about the cpus node and single processor +needn't define cpus node at all. + +===================================== +cpus and cpu node bindings definition +===================================== + +- cpus node + + Description: Container of cpu nodes + + The node name must be "cpus". + + A cpus node must define the following properties: + + - #address-cells + Usage: required + Value type: <u32> + Definition: must be set to 1 + - #size-cells + Usage: required + Value type: <u32> + Definition: must be set to 0 + +- cpu node + + Description: Describes one of SMP cores + + PROPERTIES + + - device_type + Usage: required + Value type: <string> + Definition: must be "cpu" + - reg + Usage: required + Value type: <u32> + Definition: CPU index + - compatible: + Usage: required + Value type: <string> + Definition: must contain "csky", eg: + "csky,610" + "csky,807" + "csky,810" + "csky,860" + +Example: +-------- + + cpus { + #address-cells = <1>; + #size-cells = <0>; + cpu@0 { + device_type = "cpu"; + reg = <0>; + status = "ok"; + }; + + cpu@1 { + device_type = "cpu"; + reg = <1>; + status = "ok"; + }; + }; |