Commit | Line | Data |
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e92935e1 RS |
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 | }; |