1 ==============
2 Userspace LEDs
3 ==============
4
5 The uleds driver supports userspace LEDs. This
6 triggers and can also be used to implement vir
7
8
9 Usage
10 =====
11
12 When the driver is loaded, a character device
13 create a new LED class device, open /dev/uleds
14 structure to it (found in kernel public header
15
16 #define LED_MAX_NAME_SIZE 64
17
18 struct uleds_user_dev {
19 char name[LED_MAX_NAME_SIZE];
20 };
21
22 A new LED class device will be created with th
23 any valid sysfs device node name, but consider
24 convention of "devicename:color:function".
25
26 The current brightness is found by reading a s
27 device. Values are unsigned: 0 to 255. Reading
28 changes. The device node can also be polled to
29 changes.
30
31 The LED class device will be removed when the
32 is closed.
33
34 Multiple LED class devices are created by open
35 /dev/uleds.
36
37 See tools/leds/uledmon.c for an example usersp
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.