Thank you for advice! 16.07.19 21:41, Jacek Anaszewski пише: > Hi Oleh, > > On 7/9/19 12:00 AM, Oleh Kravchenko wrote: >> >> I just figure out that this Pipe LED actually consist from 5 LEDs, not 3 :) >> And supports next level 'brightness' from SPI driver: >> - '0' Off >> - '1' On >> - '2' Cascade (waterfall down) >> -'3' InverseCascade (waterfall up) >> - '4' Bounce >> - '5' InverseBounce >> >> Please advice, can I proceed with sys attribute file to set '2'..'5' levels? > It looks like pattern trigger is the most appropriate solution for the > effects 2-5. Your driver will need to implement pattern_set op for the > LEDs supporting the effects, and then the effect will be enabled after > writing required sequence to the hw_pattern file. You will need to come > up with a sequence of values that the driver will recognize as a request > of enabling given hardware effect. Please compare > drivers/leds/leds-sc27xx-bltc.c and its ABI documentation [0] for > reference. See also hw_pattern file description in [1]. > > [0] Documentation/ABI/testing/sysfs-class-led-driver-sc27xx > [1] Documentation/ABI/testing/sysfs-class-led-trigger-pattern >
