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dt-bindings: Add documentation for the BCM63138 timer and syscon-reboot
A timer node and a syscon-reboot node are required for software reboot
to work on BCM63138, document these two nodes in the platform binding.
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
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Documentation/devicetree/bindings/arm/bcm/brcm,bcm63138.txt
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Documentation/devicetree/bindings/arm/bcm/brcm,bcm63138.txt
···
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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.txt 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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};