bindings/gpio/gpio_lpc32xx.txt

0001 NXP LPC32xx SoC GPIO controller
0002
0003 Required properties:
0004 - compatible: must be "nxp,lpc3220-gpio"
0005 - reg: Physical base address and length of the controller's registers.
0006 - gpio-controller: Marks the device node as a GPIO controller.
0007 - #gpio-cells: Should be 3:
0008    1) bank:
0009       0: GPIO P0
0010       1: GPIO P1
0011       2: GPIO P2
0012       3: GPIO P3
0013       4: GPI P3
0014       5: GPO P3
0015    2) pin number
0016    3) optional parameters:
0017       - bit 0 specifies polarity (0 for normal, 1 for inverted)
0018 - reg: Index of the GPIO group
0019
0020 Example:
0021
0022         gpio: gpio@40028000 {
0023                 compatible = "nxp,lpc3220-gpio";
0024                 reg = <0x40028000 0x1000>;
0025                 gpio-controller;
0026                 #gpio-cells = <3>; /* bank, pin, flags */
0027         };
0028
0029         leds {
0030                 compatible = "gpio-leds";
0031
0032                 led0 {
0033                         gpios = <&gpio 5 1 1>; /* GPO_P3 1, active low */
0034                         linux,default-trigger = "heartbeat";
0035                         default-state = "off";
0036                 };
0037
0038                 led1 {
0039                         gpios = <&gpio 5 14 1>; /* GPO_P3 14, active low */
0040                         linux,default-trigger = "timer";
0041                         default-state = "off";
0042                 };
0043         };