projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 60f9e37a TZ |
1 | Annapurna Labs Alpine Platform Device Tree Bindings |
| 2 | --------------------------------------------------------------- | |
| 3 | ||
| 4 | Boards in the Alpine family shall have the following properties: | |
| 5 | ||
| 6 | * Required root node properties: | |
| 7 | compatible: must contain "al,alpine" | |
| 8 | ||
| 9 | * Example: | |
| 10 | ||
| 11 | / { | |
| 12 | model = "Annapurna Labs Alpine Dev Board"; | |
| 13 | compatible = "al,alpine"; | |
| 14 | ||
| 15 | ... | |
| 16 | } | |
| 17 | ||
| 18 | * CPU node: | |
| 19 | ||
| 20 | The Alpine platform includes cortex-a15 cores. | |
| 21 | enable-method: must be "al,alpine-smp" to allow smp [1] | |
| 22 | ||
| 23 | Example: | |
| 24 | ||
| 25 | cpus { | |
| 26 | #address-cells = <1>; | |
| 27 | #size-cells = <0>; | |
| 28 | enable-method = "al,alpine-smp"; | |
| 29 | ||
| 30 | cpu@0 { | |
| 31 | compatible = "arm,cortex-a15"; | |
| 32 | device_type = "cpu"; | |
| 33 | reg = <0>; | |
| 34 | }; | |
| 35 | ||
| 36 | cpu@1 { | |
| 37 | compatible = "arm,cortex-a15"; | |
| 38 | device_type = "cpu"; | |
| 39 | reg = <1>; | |
| 40 | }; | |
| 41 | ||
| 42 | cpu@2 { | |
| 43 | compatible = "arm,cortex-a15"; | |
| 44 | device_type = "cpu"; | |
| 45 | reg = <2>; | |
| 46 | }; | |
| 47 | ||
| 48 | cpu@3 { | |
| 49 | compatible = "arm,cortex-a15"; | |
| 50 | device_type = "cpu"; | |
| 51 | reg = <3>; | |
| 52 | }; | |
| 53 | }; | |
| 54 | ||
| 55 | ||
| 56 | * Alpine CPU resume registers | |
| 57 | ||
| 58 | The CPU resume register are used to define required resume address after | |
| 59 | reset. | |
| 60 | ||
| 61 | Properties: | |
| 62 | - compatible : Should contain "al,alpine-cpu-resume". | |
| 63 | - reg : Offset and length of the register set for the device | |
| 64 | ||
| 65 | Example: | |
| 66 | ||
| 67 | cpu_resume { | |
| 68 | compatible = "al,alpine-cpu-resume"; | |
| 69 | reg = <0xfbff5ed0 0x30>; | |
| 70 | }; | |
| 71 | ||
| 72 | * Alpine System-Fabric Service Registers | |
| 73 | ||
| 74 | The System-Fabric Service Registers allow various operation on CPU and | |
| 75 | system fabric, like powering CPUs off. | |
| 76 | ||
| 77 | Properties: | |
| 78 | - compatible : Should contain "al,alpine-sysfabric-service" and "syscon". | |
| 79 | - reg : Offset and length of the register set for the device | |
| 80 | ||
| 81 | Example: | |
| 82 | ||
| 83 | nb_service { | |
| 84 | compatible = "al,alpine-sysfabric-service", "syscon"; | |
| 85 | reg = <0xfb070000 0x10000>; | |
| 86 | }; | |
| 87 | ||
| 88 | [1] arm/cpu-enable-method/al,alpine-smp |