Lines Matching +full:led +full:- +full:pattern

1 .. SPDX-License-Identifier: GPL-2.0
4 The device for Mediatek MT6370 RGB LED
8 -----------
10 The MT6370 integrates a four-channel RGB LED driver, designed to provide a
11 variety of lighting effect for mobile device applications. The RGB LED devices
12 includes a smart LED string controller and it can drive 3 channels of LEDs with
13 a sink current up to 24mA and a CHG_VIN power good indicator LED with sink
15 PWM Dimming mode, breath pattern mode, and constant current mode. The device
16 can increase or decrease the brightness of the RGB LED via an I2C interface.
18 The breath pattern for a channel can be programmed using the "pattern" trigger,
21 /sys/class/leds/<led>/hw_pattern
22 --------------------------------
24 Specify a hardware breath pattern for a MT6370 RGB LED.
26 The breath pattern is a series of timing pairs, with the hold-time expressed in
28 '/sys/class/leds/<led>/brightness'. The pattern doesn't include the brightness
29 setting. Hardware pattern only controls the timing for each pattern stage
32 Pattern diagram::
34          "0 Tr1 0 Tr2 0 Tf1 0 Tf2 0 Ton 0 Toff" --> '0' for dummy brightness code
43           |   ---                      ---                  ---
44           |---                            ---            ---
45           +----------------------------------============------------> Time
50   * Tr1:    First rising time for 0% - 30% load.
51   * Tr2:    Second rising time for 31% - 100% load.
53   * Tf1:    First falling time for 100% - 31% load.
60 Pattern example::