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