Lines Matching +full:pwm +full:- +full:leds

1 .. SPDX-License-Identifier: GPL-2.0
8 -----------
11 number of PWM channels, a programmable pattern lookup table and a RGB LED
15 individual LEDs, grouped together as RGB LEDs or otherwise be accessed as PWM
16 channels. The output of each PWM channel is routed to other hardware
19 The each PWM channel can operate with a period between 27us and 384 seconds and
30 /sys/class/leds/<led>/hw_pattern
31 --------------------------------
35 The pattern is a series of brightness and hold-time pairs, with the hold-time
39 transitions expected by the leds-trigger-pattern format, each entry in the
40 pattern must be followed a zero-length entry of the same brightness.
48     255 +----+    +----+
50       0 |    +----+    +----
51         +---------------------->
54 The LPG supports specifying a longer hold-time for the first and last element
57 Low-pause pattern::
63     255 +--------+    +----+    +----+    +--------+
65       0 |        +----+    +----+    +----+        +----
66         +----------------------------->
69 Similarily, the last entry can be stretched by using a higher hold-time on the
72 In order to save space in the shared lookup table the LPG supports "ping-pong"
77 specified hold-time of the middle item in the pattern is allowed to have a
78 different hold-time.