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Documentation / devicetree / bindings / gpio / gpio_lpc32xx.txt




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Based on kernel version 3.9. Page generated on 2013-05-02 22:58 EST.

1	NXP LPC32xx SoC GPIO controller
2	
3	Required properties:
4	- compatible: must be "nxp,lpc3220-gpio"
5	- reg: Physical base address and length of the controller's registers.
6	- gpio-controller: Marks the device node as a GPIO controller.
7	- #gpio-cells: Should be 3:
8	   1) bank:
9	      0: GPIO P0
10	      1: GPIO P1
11	      2: GPIO P2
12	      3: GPIO P3
13	      4: GPI P3
14	      5: GPO P3
15	   2) pin number
16	   3) optional parameters:
17	      - bit 0 specifies polarity (0 for normal, 1 for inverted)
18	- reg: Index of the GPIO group
19	
20	Example:
21	
22		gpio: gpio@40028000 {
23			compatible = "nxp,lpc3220-gpio";
24			reg = <0x40028000 0x1000>;
25			gpio-controller;
26			#gpio-cells = <3>; /* bank, pin, flags */
27		};
28	
29		leds {
30			compatible = "gpio-leds";
31	
32			led0 {
33				gpios = <&gpio 5 1 1>; /* GPO_P3 1, active low */
34				linux,default-trigger = "heartbeat";
35				default-state = "off";
36			};
37	
38			led1 {
39				gpios = <&gpio 5 14 1>; /* GPO_P3 14, active low */
40				linux,default-trigger = "timer";
41				default-state = "off";
42			};
43		};
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