1 CE4100 Device Tree Bindings 1 CE4100 Device Tree Bindings
2 --------------------------- 2 ---------------------------
3 3
4 The CE4100 SoC uses for in core peripherals th 4 The CE4100 SoC uses for in core peripherals the following compatible
5 format: <vendor>,<chip>-<device>. 5 format: <vendor>,<chip>-<device>.
6 Many of the "generic" devices like HPET or IO 6 Many of the "generic" devices like HPET or IO APIC have the ce4100
7 name in their compatible property because they 7 name in their compatible property because they first appeared in this
8 SoC. 8 SoC.
9 9
10 The CPU nodes 10 The CPU nodes
11 ------------- 11 -------------
12 12
13 cpus { 13 cpus {
14 #address-cells = <1>; 14 #address-cells = <1>;
15 #size-cells = <0>; 15 #size-cells = <0>;
16 16
17 cpu@0 { 17 cpu@0 {
18 device_type = "cpu"; 18 device_type = "cpu";
19 compatible = "intel,ce 19 compatible = "intel,ce4100";
20 reg = <0x00>; 20 reg = <0x00>;
21 }; 21 };
22 22
23 cpu@2 { 23 cpu@2 {
24 device_type = "cpu"; 24 device_type = "cpu";
25 compatible = "intel,ce 25 compatible = "intel,ce4100";
26 reg = <0x02>; 26 reg = <0x02>;
27 }; 27 };
28 }; 28 };
29 29
30 A "cpu" node describes one logical processor ( 30 A "cpu" node describes one logical processor (hardware thread).
31 31
32 Required properties: 32 Required properties:
33 33
34 - device_type 34 - device_type
35 Device type, must be "cpu". 35 Device type, must be "cpu".
36 36
37 - reg 37 - reg
38 Local APIC ID, the unique number assig 38 Local APIC ID, the unique number assigned to each processor by
39 system hardware. 39 system hardware.
40 40
41 The SoC node 41 The SoC node
42 ------------ 42 ------------
43 43
44 This node describes the in-core peripherals. R 44 This node describes the in-core peripherals. Required property:
45 compatible = "intel,ce4100-cp"; 45 compatible = "intel,ce4100-cp";
46 46
47 The PCI node 47 The PCI node
48 ------------ 48 ------------
49 This node describes the PCI bus on the SoC. It 49 This node describes the PCI bus on the SoC. Its property should be
50 compatible = "intel,ce4100-pci", "pci"; 50 compatible = "intel,ce4100-pci", "pci";
51 51
52 If the OS is using the IO-APIC for interrupt r 52 If the OS is using the IO-APIC for interrupt routing then the reported
53 interrupt numbers for devices is no longer tru 53 interrupt numbers for devices is no longer true. In order to obtain the
54 correct interrupt number, the child node which 54 correct interrupt number, the child node which represents the device has
55 to contain the interrupt property. Besides the 55 to contain the interrupt property. Besides the interrupt property it has
56 to contain at least the reg property containin 56 to contain at least the reg property containing the PCI bus address and
57 compatible property according to "PCI Bus Bind 57 compatible property according to "PCI Bus Binding Revision 2.1".
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