Kernel-4.18.0-80.el8_gpio-nmk

Nomadik GPIO controller

Required properties:

• compatible : Should be “st,nomadik-gpio”.
• reg : Physical base address and length of the controller’s registers.
• interrupts : The interrupt outputs from the controller.
• #gpio-cells : Should be two:

                        The first cell is the pin number.
                        The second cell is used to specify optional parameters:
                          - bits[3:0] 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.
  

• gpio-controller : Marks the device node as a GPIO controller.
• interrupt-controller : Marks the device node as an interrupt controller.
• gpio-bank : Specifies which bank a controller owns.
• st,supports-sleepmode : Specifies whether controller can sleep or not

Example:

            gpio1: gpio@8012e080 {
                    compatible = "st,nomadik-gpio";
                    reg =  <0x8012e080 0x80>;
                    interrupts = <0 120 0x4>;
                    #gpio-cells = <2>;
                    gpio-controller;
                    interrupt-controller;
                    st,supports-sleepmode;
                    gpio-bank = <1>;
            };