Zodiac Inflight Innovations RAVE Supervisory Processor Power Button Bindings RAVE SP input device is a "MFD cell" device corresponding to power button functionality of RAVE Supervisory Processor. It is expected that its Device Tree node is specified as a child of the node corresponding to the parent RAVE SP device (as documented in Documentation/devicetree/bindings/mfd/zii,rave-sp.txt) Required properties: - compatible: Should be "zii,rave-sp-pwrbutton" Example: rave-sp { compatible = "zii,rave-sp-rdu1"; current-speed = <38400>; pwrbutton { compatible = "zii,rave-sp-pwrbutton"; }; }