Kernel-4.18.0-80.el8_nvidia,tegra20-gpio

NVIDIA Tegra GPIO controller

Required properties:

• compatible : “nvidia,tegra-gpio”
• reg : Physical base address and length of the controller’s registers.
• interrupts : The interrupt outputs from the controller. For Tegra20,
  there should be 7 interrupts specified, and for Tegra30, there should
  be 8 interrupts specified.
• #gpio-cells : Should be two. The first cell is the pin number and the
  second cell is used to specify optional parameters:
  • bit 0 specifies polarity (0 for normal, 1 for inverted)
• gpio-controller : Marks the device node as a GPIO 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.
  Valid combinations are 1, 2, 3, 4, 8.
  

• interrupt-controller : Marks the device node as an interrupt controller.

Example:

gpio: gpio@6000d000 {
compatible = “nvidia,tegra20-gpio”;
reg = < 0x6000d000 0x1000 >;
interrupts = < 0 32 0x04
0 33 0x04
0 34 0x04
0 35 0x04
0 55 0x04
0 87 0x04
0 89 0x04 >;
#gpio-cells = <2>;
gpio-controller;
#interrupt-cells = <2>;
interrupt-controller;
};