Re: [PATCH v4 2/2] leds: add LED driver for EL15203000 board

Oleh Kravchenko
2019-08-14T20:16:12Z

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Hello Jacek,

14.08.19 22:57, Jacek Anaszewski пише:
>>>>
>>>> All pattern is predefined, you can't change them at all.
>>>> I just tried to describe real things what happened in LED board.
>>>> It's ticks every 800 milliseconds for Pipe LEDs.
>>>
>>> It makes me wonder how you figured out the values? If you have
>>> a documentation for this controller, could you share how the pattern
>>> settings are documented?
>>
>> I saw the code of firmware.
>> Not sure if I can find any documentation for it right now.
>
> Have you tried to alter the values? Or check what happens when
> the duplication is removed?

What do you mean alter? It doesn't make any sense.
Board is accepts only brightness level from '0' to '5'.
I'm really confused :-)

>>>
>>> For the first two we could do without sequence duplication.
>>
>> Ok, I will reduce it.
>
> Please hold on for a while. I will have some more remarks to the driver,
> just collecting missing info for now to gain more complete view on this
> device.

Here is the full story:

EL15203000 LEDs board (aka RED LEDs board, because it has only RED LEDs).
It's provide access to 3 LEDs:

- First LED (Screen) is a light tube around big 21" screen
It's have 3 brightness levels:
* OFF
* ON
* Breathing mode (8 seconds full cycle)
- Second LED (Vending area) is highlight coffee cap
* OFF
* ON
- Third LED (Pipe) is actually virtual, because consists from 5 LEDs
* OFF for all 5 LEDs
* ON for all 5 LEDs
* Cascade
* Inverses cascade
* Bounce
* Inverses bounce

--
Best regards,
Oleh Kravchenko

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