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* ARM CPUs binding description
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.
Bindings for CPU nodes follow the ePAPR standard, available from:
http://devicetree.org
For the ARM architecture every CPU node must contain the following properties:
- device_type: must be "cpu"
- reg: property matching the CPU MPIDR[23:0] register bits
reg[31:24] bits must be set to 0
- compatible: should be one of:
"arm,arm1020"
"arm,arm1020e"
"arm,arm1022"
"arm,arm1026"
"arm,arm720"
"arm,arm740"
"arm,arm7tdmi"
"arm,arm920"
"arm,arm922"
"arm,arm925"
"arm,arm926"
"arm,arm940"
"arm,arm946"
"arm,arm9tdmi"
"arm,cortex-a5"
"arm,cortex-a7"
"arm,cortex-a8"
"arm,cortex-a9"
"arm,cortex-a15"
"arm,arm1136"
"arm,arm1156"
"arm,arm1176"
"arm,arm11mpcore"
"faraday,fa526"
"intel,sa110"
"intel,sa1100"
"marvell,feroceon"
"marvell,mohawk"
"marvell,xsc3"
"marvell,xscale"
Example:
cpus {
#size-cells = <0>;
#address-cells = <1>;
CPU0: cpu@0 {
device_type = "cpu";
compatible = "arm,cortex-a15";
reg = <0x0>;
};
CPU1: cpu@1 {
device_type = "cpu";
compatible = "arm,cortex-a15";
reg = <0x1>;
};
CPU2: cpu@100 {
device_type = "cpu";
compatible = "arm,cortex-a7";
reg = <0x100>;
};
CPU3: cpu@101 {
device_type = "cpu";
compatible = "arm,cortex-a7";
reg = <0x101>;
};
};
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