Kernel-4.18.0-80.el8_gpio-zynq

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”
• 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-parent : Must be core interrupt controller
• 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>;
};