1 Broadcom BCM63138 DSL System-on-a-Chip device tree bindings
2 -----------------------------------------------------------
3
4 Boards compatible with the BCM63138 DSL System-on-a-Chip should have the
5 following properties:
6
7 Required root node property:
8
9 compatible: should be "brcm,bcm63138"
10
11 An optional Boot lookup table Device Tree node is required for secondary CPU
12 initialization as well as a 'resets' phandle to the correct PMB controller as
13 defined in reset/brcm,bcm63138-pmb.txt for this secondary CPU, and an
14 'enable-method' property.
15
16 Required properties for the Boot lookup table node:
17 - compatible: should be "brcm,bcm63138-bootlut"
18 - reg: register base address and length for the Boot Lookup table
19
20 Optional properties for the primary CPU node:
21 - enable-method: should be "brcm,bcm63138"
22
23 Optional properties for the secondary CPU node:
24 - enable-method: should be "brcm,bcm63138"
25 - resets: phandle to the relevant PMB controller, one integer indicating the internal
26 bus number, and a second integer indicating the address of the CPU in the PMB
27 internal bus number.
28
29 Example:
30
31 cpus {
32 cpu@0 {
33 compatible = "arm,cortex-a9";
34 reg = <0>;
35 ...
36 enable-method = "brcm,bcm63138";
37 };
38
39 cpu@1 {
40 compatible = "arm,cortex-a9";
41 reg = <1>;
42 ...
43 enable-method = "brcm,bcm63138";
44 resets = <&pmb0 4 1>;
45 };
46 };
47
48 bootlut: bootlut@8000 {
49 compatible = "brcm,bcm63138-bootlut";
50 reg = <0x8000 0x50>;
51 };
52
53 =======
54 reboot
55 ------
56 Two nodes are required for software reboot: a timer node and a syscon-reboot node.
57
58 Timer node:
59
60 - compatible: Must be "brcm,bcm6328-timer", "syscon"
61 - reg: Register base address and length
62
63 Syscon reboot node:
64
65 See Documentation/devicetree/bindings/power/reset/syscon-reboot.yaml for the
66 detailed list of properties, the two values defined below are specific to the
67 BCM6328-style timer:
68
69 - offset: Should be 0x34 to denote the offset of the TIMER_WD_TIMER_RESET register
70 from the beginning of the TIMER block
71 - mask: Should be 1 for the SoftRst bit.
72
73 Example:
74
75 timer: timer@80 {
76 compatible = "brcm,bcm6328-timer", "syscon";
77 reg = <0x80 0x3c>;
78 };
79
80 reboot {
81 compatible = "syscon-reboot";
82 regmap = <&timer>;
83 offset = <0x34>;
84 mask = <0x1>;
85 };
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