Annapurna Labs Alpine Platform Device Tree Bindings --------------------------------------------------------------- Boards in the Alpine family shall have the following properties: * Required root node properties: compatible: must contain "al,alpine" * Example: / { model = "Annapurna Labs Alpine Dev Board"; compatible = "al,alpine"; ... } * CPU node: The Alpine platform includes cortex-a15 cores. enable-method: must be "al,alpine-smp" to allow smp [1] Example: cpus { #address-cells = <1>; #size-cells = <0>; enable-method = "al,alpine-smp"; cpu@0 { compatible = "arm,cortex-a15"; device_type = "cpu"; reg = <0>; }; cpu@1 { compatible = "arm,cortex-a15"; device_type = "cpu"; reg = <1>; }; cpu@2 { compatible = "arm,cortex-a15"; device_type = "cpu"; reg = <2>; }; cpu@3 { compatible = "arm,cortex-a15"; device_type = "cpu"; reg = <3>; }; }; * Alpine CPU resume registers The CPU resume register are used to define required resume address after reset. Properties: - compatible : Should contain "al,alpine-cpu-resume". - reg : Offset and length of the register set for the device Example: cpu_resume { compatible = "al,alpine-cpu-resume"; reg = <0xfbff5ed0 0x30>; }; * Alpine System-Fabric Service Registers The System-Fabric Service Registers allow various operation on CPU and system fabric, like powering CPUs off. Properties: - compatible : Should contain "al,alpine-sysfabric-service" and "syscon". - reg : Offset and length of the register set for the device Example: nb_service { compatible = "al,alpine-sysfabric-service", "syscon"; reg = <0xfb070000 0x10000>; }; [1] arm/cpu-enable-method/al,alpine-smp