Hi Oleh, Thank you for the patch set. On 8/8/19 10:32 PM, Oleh Kravchenko wrote: > This patch adds a LED class driver for the RGB LEDs found on > the Crane Merchandising System EL15203000 LEDs board > (aka RED LEDs board). > > Signed-off-by: Oleh Kravchenko <oleg@xxxxxxxxxx> > --- > .../testing/sysfs-class-led-driver-el15203000 | 22 + > drivers/leds/Kconfig | 13 + > drivers/leds/Makefile | 1 + > drivers/leds/leds-el15203000.c | 478 ++++++++++++++++++ > 4 files changed, 514 insertions(+) > create mode 100644 Documentation/ABI/testing/sysfs-class-led-driver-el15203000 > create mode 100644 drivers/leds/leds-el15203000.c > > diff --git a/Documentation/ABI/testing/sysfs-class-led-driver-el15203000 b/Documentation/ABI/testing/sysfs-class-led-driver-el15203000 > new file mode 100644 > index 000000000000..91a483e493d9 > --- /dev/null > +++ b/Documentation/ABI/testing/sysfs-class-led-driver-el15203000 > @@ -0,0 +1,22 @@ > +What: /sys/class/leds/<led>/hw_pattern > +Date: August 2019 > +KernelVersion: 5.3 > +Description: > + Specify a hardware pattern for the EL15203000 LED. > + The LEDs board supports only predefined patterns by firmware > + for specific LEDs. > + > + Breathing mode for Screen frame light tube: > + "0 4000 1 4000" > + > + Cascade mode for Pipe LED: > + "1 800 2 800 4 800 8 800 16 800 1 800 2 800 4 800 8 800 16 800" Why the sequence "1 800 2 800 4 800 8 800 16 800" is duplicated here? It seems redundant. But aside of that - aren't the timings modifiable? In other words - are these all patterns somehow configurable or they are pre-programmed? > + > + Inverted cascade mode for Pipe LED: > + "30 800 29 800 27 800 23 800 15 800 30 800 29 800 27 800 23 800 15 800" Similar duplication here. > + > + Bounce mode for Pipe LED: > + "1 800 2 800 4 800 8 800 16 800 16 800 8 800 4 800 2 800 1 800" Instead of two repeating "16 800" you could provide "16 1600". But here again is the question whether these values are configurable. >From what I can see in your driver implementation you're expecting exactly the values provided in these examples to enable given hardware pattern (led_pattern_cmp()). > + > + Inverted bounce mode for Pipe LED: > + "30 800 29 800 27 800 23 800 15 800 15 800 23 800 27 800 29 800 30 800" -- Best regards, Jacek Anaszewski
