1* Device tree bindings for Nokia Retu and Tahvo multi-function device 2 3Retu and Tahvo are a multi-function devices found on Nokia Internet 4Tablets (770, N800 and N810). The Retu chip provides watchdog timer 5and power button control functionalities while Tahvo chip provides 6USB transceiver functionality. 7 8Required properties: 9- compatible: "nokia,retu" or "nokia,tahvo" 10- reg: Specifies the CBUS slave address of the ASIC chip 11- interrupts: The interrupt line the device is connected to 12 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