1Xilinx Zynq GPIO controller Device Tree Bindings 2------------------------------------------- 3 4Required properties: 5- #gpio-cells : Should be two 6 - First cell is the GPIO line number 7 - Second cell is used to specify optional 8 parameters (unused) 9- compatible : Should be "xlnx,zynq-gpio-1.0" or 10 "xlnx,zynqmp-gpio-1.0" or "xlnx,versal-gpio-1.0 11 or "xlnx,pmc-gpio-1.0 12- clocks : Clock specifier (see clock bindings for details) 13- gpio-controller : Marks the device node as a GPIO controller. 14- interrupts : Interrupt specifier (see interrupt bindings for 15 details) 16- interrupt-controller : Marks the device node as an interrupt controller. 17- #interrupt-cells : Should be 2. The first cell is the GPIO number. 18 The second cell bits[3:0] is used to specify trigger type and level flags: 19 1 = low-to-high edge triggered. 20 2 = high-to-low edge triggered. 21 4 = active high level-sensitive. 22 8 = active low level-sensitive. 23- reg : Address and length of the register set for the device 24 25Example: 26 gpio@e000a000 { 27 #gpio-cells = <2>; 28 compatible = "xlnx,zynq-gpio-1.0"; 29 clocks = <&clkc 42>; 30 gpio-controller; 31 interrupt-parent = <&intc>; 32 interrupts = <0 20 4>; 33 interrupt-controller; 34 #interrupt-cells = <2>; 35 reg = <0xe000a000 0x1000>; 36 }; 37