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Xilinx Zynq GPIO controller Device Tree Bindings ------------------------------------------- Required properties: - #gpio-cells : Should be two - First cell is the GPIO line number - Second cell is used to specify optional parameters (unused) - compatible : Should be "xlnx,zynq-gpio-1.0" or "xlnx,zynqmp-gpio-1.0" or "xlnx,versal-gpio-1.0 or "xlnx,pmc-gpio-1.0 - clocks : Clock specifier (see clock bindings for details) - gpio-controller : Marks the device node as a GPIO controller. - interrupts : Interrupt specifier (see interrupt bindings for details) - interrupt-controller : Marks the device node as an interrupt controller. - #interrupt-cells : Should be 2. The first cell is the GPIO number. The second cell bits[3:0] is used to specify trigger type and level flags: 1 = low-to-high edge triggered. 2 = high-to-low edge triggered. 4 = active high level-sensitive. 8 = active low level-sensitive. - reg : Address and length of the register set for the device Example: gpio@e000a000 { #gpio-cells = <2>; compatible = "xlnx,zynq-gpio-1.0"; clocks = <&clkc 42>; gpio-controller; interrupt-parent = <&intc>; interrupts = <0 20 4>; interrupt-controller; #interrupt-cells = <2>; reg = <0xe000a000 0x1000>; }; |