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Broadcom BCM63138 DSL System-on-a-Chip device tree bindings
-----------------------------------------------------------
Boards compatible with the BCM63138 DSL System-on-a-Chip should have the
following properties:
Required root node property:
compatible: should be "brcm,bcm63138"
An optional Boot lookup table Device Tree node is required for secondary CPU
initialization as well as a 'resets' phandle to the correct PMB controller as
defined in reset/brcm,bcm63138-pmb.txt for this secondary CPU, and an
'enable-method' property.
Required properties for the Boot lookup table node:
- compatible: should be "brcm,bcm63138-bootlut"
- reg: register base address and length for the Boot Lookup table
Optional properties for the primary CPU node:
- enable-method: should be "brcm,bcm63138"
Optional properties for the secondary CPU node:
- enable-method: should be "brcm,bcm63138"
- resets: phandle to the relevant PMB controller, one integer indicating the internal
bus number, and a second integer indicating the address of the CPU in the PMB
internal bus number.
Example:
cpus {
cpu@0 {
compatible = "arm,cotex-a9";
reg = <0>;
...
enable-method = "brcm,bcm63138";
};
cpu@1 {
compatible = "arm,cortex-a9";
reg = <1>;
...
enable-method = "brcm,bcm63138";
resets = <&pmb0 4 1>;
};
};
bootlut: bootlut@8000 {
compatible = "brcm,bcm63138-bootlut";
reg = <0x8000 0x50>;
};
=======
reboot
------
Two nodes are required for software reboot: a timer node and a syscon-reboot node.
Timer node:
- compatible: Must be "brcm,bcm6328-timer", "syscon"
- reg: Register base address and length
Syscon reboot node:
See Documentation/devicetree/bindings/power/reset/syscon-reboot.yaml for the
detailed list of properties, the two values defined below are specific to the
BCM6328-style timer:
- offset: Should be 0x34 to denote the offset of the TIMER_WD_TIMER_RESET register
from the beginning of the TIMER block
- mask: Should be 1 for the SoftRst bit.
Example:
timer: timer@80 {
compatible = "brcm,bcm6328-timer", "syscon";
reg = <0x80 0x3c>;
};
reboot {
compatible = "syscon-reboot";
regmap = <&timer>;
offset = <0x34>;
mask = <0x1>;
};
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