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1* Device tree bindings for Nokia Retu and Tahvo multi-function device2 3Retu and Tahvo are a multi-function devices found on Nokia Internet4Tablets (770, N800 and N810). The Retu chip provides watchdog timer5and power button control functionalities while Tahvo chip provides6USB transceiver functionality.7 8Required properties:9- compatible: "nokia,retu" or "nokia,tahvo"10- reg: Specifies the CBUS slave address of the ASIC chip11- interrupts: The interrupt line the device is connected to12 13Example:14 15cbus0 {16 compatible = "i2c-cbus-gpio";17 ...18 retu: retu@1 {19 compatible = "nokia,retu";20 interrupt-parent = <&gpio4>;21 interrupts = <12 IRQ_TYPE_EDGE_RISING>;22 reg = <0x1>;23 };24};25