Add usage for sysfs hw_pattern entry for leds-st1202 Signed-off-by: Vicentiu Galanopulo <vicentiu.galanopulo@xxxxxxxxxxxxxxxxx> --- Documentation/leds/leds-st1202.rst | 36 ++++++++++++++++++++++++++++++ 1 file changed, 36 insertions(+) create mode 100644 Documentation/leds/leds-st1202.rst diff --git a/Documentation/leds/leds-st1202.rst b/Documentation/leds/leds-st1202.rst new file mode 100644 index 000000000000..72286a512c69 --- /dev/null +++ b/Documentation/leds/leds-st1202.rst @@ -0,0 +1,36 @@ +.. SPDX-License-Identifier: GPL-2.0 + +============================================ +Kernel driver for STMicroelectronics LED1202 +============================================ + +/sys/class/leds/<led>/hw_pattern +-------------------------------- + +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. + +- Min pattern duration: 22 ms +- Max pattern duration: 5660 ms + +The format of the hardware pattern values should be: +"brightness duration brightness duration ..." + +/sys/class/leds/<led>/repeat +---------------------------- + +Specify a pattern repeat number, which is common for all channels. +Default is 1, other negative numbers and number 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. -- 2.39.3 (Apple Git-145)
