Documentation/leds/leds-st1202.rst
.. SPDX-License-Identifier: GPL-2.0
Specify a hardware pattern for the ST1202 LED. The LED controller implements 12 low-side current generators with independent dimming control. Internal volatile memory allows the user to store up to 8 different patterns. Each pattern is a particular output configuration in terms of PWM duty-cycle and duration (ms).
To be compatible with the hardware pattern format, maximum 8 tuples of brightness (PWM) and duration must be written to hw_pattern.
The format of the hardware pattern values should be: "brightness duration brightness duration ..."
Specify a pattern repeat number, which is common for all channels. Default is 1; negative numbers and 0 are invalid.
This file will always return the originally written repeat number.
When the 255 value is written to it, all patterns will repeat indefinitely.