1*c66ec88fSEmmanuel VadotAvionic Design N-bit GPIO expander bindings 2*c66ec88fSEmmanuel Vadot 3*c66ec88fSEmmanuel VadotRequired properties: 4*c66ec88fSEmmanuel Vadot- compatible: should be "ad,gpio-adnp" 5*c66ec88fSEmmanuel Vadot- reg: The I2C slave address for this device. 6*c66ec88fSEmmanuel Vadot- interrupts: Interrupt specifier for the controllers interrupt. 7*c66ec88fSEmmanuel Vadot- #gpio-cells: Should be 2. The first cell is the GPIO number and the 8*c66ec88fSEmmanuel Vadot second cell is used to specify optional parameters: 9*c66ec88fSEmmanuel Vadot - bit 0: polarity (0: normal, 1: inverted) 10*c66ec88fSEmmanuel Vadot- gpio-controller: Marks the device as a GPIO controller 11*c66ec88fSEmmanuel Vadot- nr-gpios: The number of pins supported by the controller. 12*c66ec88fSEmmanuel Vadot 13*c66ec88fSEmmanuel VadotThe GPIO expander can optionally be used as an interrupt controller, in 14*c66ec88fSEmmanuel Vadotwhich case it uses the default two cell specifier as described in 15*c66ec88fSEmmanuel VadotDocumentation/devicetree/bindings/interrupt-controller/interrupts.txt. 16*c66ec88fSEmmanuel Vadot 17*c66ec88fSEmmanuel VadotExample: 18*c66ec88fSEmmanuel Vadot 19*c66ec88fSEmmanuel Vadot gpioext: gpio-controller@41 { 20*c66ec88fSEmmanuel Vadot compatible = "ad,gpio-adnp"; 21*c66ec88fSEmmanuel Vadot reg = <0x41>; 22*c66ec88fSEmmanuel Vadot 23*c66ec88fSEmmanuel Vadot interrupt-parent = <&gpio>; 24*c66ec88fSEmmanuel Vadot interrupts = <160 1>; 25*c66ec88fSEmmanuel Vadot 26*c66ec88fSEmmanuel Vadot gpio-controller; 27*c66ec88fSEmmanuel Vadot #gpio-cells = <2>; 28*c66ec88fSEmmanuel Vadot 29*c66ec88fSEmmanuel Vadot interrupt-controller; 30*c66ec88fSEmmanuel Vadot #interrupt-cells = <2>; 31*c66ec88fSEmmanuel Vadot 32*c66ec88fSEmmanuel Vadot nr-gpios = <64>; 33*c66ec88fSEmmanuel Vadot }; 34