Kernel-4.18.0-80.el8_nxp,lpc1850-gpio

NXP LPC18xx/43xx GPIO controller Device Tree Bindings

Required properties:

• compatible : Should be “nxp,lpc1850-gpio”
• reg : Address and length of the register set for the device
• clocks : Clock specifier (see clock bindings for details)
• gpio-controller : Marks the device node as a GPIO controller.
• #gpio-cells : Should be two

          - First cell is the GPIO line number
          - Second cell is used to specify polarity
  

Optional properties:

• gpio-ranges : Mapping between GPIO and pinctrl

Example:
#define LPC_GPIO(port, pin) (port * 32 + pin)
#define LPC_PIN(port, pin) (0x##port * 32 + pin)

gpio: gpio@400f4000 {
compatible = “nxp,lpc1850-gpio”;
reg = <0x400f4000 0x4000>;
clocks = <&ccu1 CLK_CPU_GPIO>;
gpio-controller;
#gpio-cells = <2>;
gpio-ranges = <&pinctrl LPC_GPIO(0,0) LPC_PIN(0,0) 2>,
…
<&pinctrl LPC_GPIO(7,19) LPC_PIN(f,5) 7>;
};

gpio_joystick {
compatible = “gpio-keys-polled”;
…

button@0 {
    ...
    gpios = <&gpio LPC_GPIO(4,8) GPIO_ACTIVE_LOW>;
};

};