linux/Documentation/devicetree/bindings/power/twl-charger.txt

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TWL BCI (Battery Charger Interface)
Required properties:
- compatible:
- "ti,twl4030-bci"
- interrupts: two interrupt lines from the TWL SIH (secondary
interrupt handler) - interrupts 9 and 2.
Optional properties:
- ti,bb-uvolt: microvolts for charging the backup battery.
- ti,bb-uamp: microamps for charging the backup battery.
Examples:
bci {
compatible = "ti,twl4030-bci";
interrupts = <9>, <2>;
ti,bb-uvolt = <3200000>;
ti,bb-uamp = <150>;
};