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