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-NXP LPC18xx/43xx GPIO controller Device Tree Bindings
------------------------------------------------------
-
-Required properties:
-- compatible : Should be "nxp,lpc1850-gpio"
-- reg : List of addresses and lengths of the GPIO controller
- register sets
-- reg-names : Should be "gpio", "gpio-pin-ic", "gpio-group0-ic" and
- "gpio-gpoup1-ic"
-- clocks : Phandle and clock specifier pair for GPIO controller
-- resets : Phandle and reset specifier pair for GPIO controller
-- gpio-controller : Marks the device node as a GPIO controller
-- #gpio-cells : Should be two:
- - The first cell is the GPIO line number
- - The second cell is used to specify polarity
-- interrupt-controller : Marks the device node as an interrupt controller
-- #interrupt-cells : Should be two:
- - The first cell is an interrupt number within
- 0..9 range, for GPIO pin interrupts it is equal
- to 'nxp,gpio-pin-interrupt' property value of
- GPIO pin configuration, 8 is for GPIO GROUP0
- interrupt, 9 is for GPIO GROUP1 interrupt
- - The second cell is used to specify interrupt type
-
-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>, <0x40087000 0x1000>,
- <0x40088000 0x1000>, <0x40089000 0x1000>;
- reg-names = "gpio", "gpio-pin-ic",
- "gpio-group0-ic", "gpio-gpoup1-ic";
- clocks = <&ccu1 CLK_CPU_GPIO>;
- resets = <&rgu 28>;
- gpio-controller;
- #gpio-cells = <2>;
- interrupt-controller;
- #interrupt-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";
- ...
-
- button0 {
- ...
- interrupt-parent = <&gpio>;
- interrupts = <1 IRQ_TYPE_EDGE_BOTH>;
- gpios = <&gpio LPC_GPIO(4,8) GPIO_ACTIVE_LOW>;
- };
-};