blob: 49819367a011f479dbce58ffdaa4017d672869d8 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
|
NXP LPC32xx SoC GPIO controller
Required properties:
- compatible: must be "nxp,lpc3220-gpio"
- reg: Physical base address and length of the controller's registers.
- gpio-controller: Marks the device node as a GPIO controller.
- #gpio-cells: Should be 3:
1) bank:
0: GPIO P0
1: GPIO P1
2: GPIO P2
3: GPIO P3
4: GPI P3
5: GPO P3
2) pin number
3) optional parameters:
- bit 0 specifies polarity (0 for normal, 1 for inverted)
- reg: Index of the GPIO group
Example:
gpio: gpio@40028000 {
compatible = "nxp,lpc3220-gpio";
reg = <0x40028000 0x1000>;
gpio-controller;
#gpio-cells = <3>; /* bank, pin, flags */
};
leds {
compatible = "gpio-leds";
led0 {
gpios = <&gpio 5 1 1>; /* GPO_P3 1, active low */
linux,default-trigger = "heartbeat";
default-state = "off";
};
led1 {
gpios = <&gpio 5 14 1>; /* GPO_P3 14, active low */
linux,default-trigger = "timer";
default-state = "off";
};
};
|
