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