Kernel-4.18.0-80.el8_gpio-omap

OMAP GPIO controller bindings

Required properties:

• compatible:
  • “ti,omap2-gpio” for OMAP2 controllers
  • “ti,omap3-gpio” for OMAP3 controllers
  • “ti,omap4-gpio” for OMAP4 controllers
• gpio-controller : Marks the device node as a GPIO controller.
• #gpio-cells : Should be two.
  • first cell is the pin number
  • second cell is used to specify optional parameters (unused)
• interrupt-controller: Mark the device node as an interrupt controller.
• #interrupt-cells : Should be 2.
  The first cell is the GPIO number.
  The second cell is used to specify flags:
  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.
  

OMAP specific properties:

• ti,hwmods: Name of the hwmod associated to the GPIO:

        "gpio<X>", <X> being the 1-based instance number
        from the HW spec.
  

• ti,gpio-always-on: Indicates if a GPIO bank is always powered and

        so will never lose its logic state.
  

Example:

gpio4: gpio4 {
compatible = “ti,omap4-gpio”;
ti,hwmods = “gpio4”;
gpio-controller;
#gpio-cells = <2>;
interrupt-controller;
#interrupt-cells = <2>;
};