Linux-LEDs Archive on lore.kernel.org
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From: Jacek Anaszewski <jacek.anaszewski@gmail.com>
To: Oleh Kravchenko <oleg@kaa.org.ua>,
	devicetree@vger.kernel.org, linux-leds@vger.kernel.org
Subject: Re: [PATCH v4 2/2] leds: add LED driver for EL15203000 board
Date: Wed, 14 Aug 2019 22:53:22 +0200
Message-ID: <4af185e2-95cf-4e21-f3f0-b35bd39441e3@gmail.com> (raw)
In-Reply-To: <e72f3669-1537-54ee-5ddd-ea77f9d13f07@kaa.org.ua>

On 8/14/19 10:16 PM, Oleh Kravchenko wrote:
> 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 :-)

OK, I didn't analyze the driver thoroughly enough.
Now everything is clear to me. Patterns are triggered just
by writing two-byte command.

>>>>
>>>> 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)

OK, so this is LED string. We would need to bend rules to make it
appearing as a single LED class device, but allowing non-synchronous
blinking of LEDs in the string.

> - 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
Similarly in case of this one. I will give you a feedback on how
to define the patterns within few days.

-- 
Best regards,
Jacek Anaszewski

  reply index

Thread overview: 22+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-08-08 20:32 [PATCH v4 1/2] dt-bindings: Add docs for EL15203000 Oleh Kravchenko
2019-08-08 20:32 ` [PATCH v4 2/2] leds: add LED driver for EL15203000 board Oleh Kravchenko
2019-08-13 20:28   ` Jacek Anaszewski
2019-08-13 20:37     ` Oleh Kravchenko
2019-08-14 18:18       ` Jacek Anaszewski
2019-08-14 19:46         ` Oleh Kravchenko
2019-08-14 19:57           ` Jacek Anaszewski
2019-08-14 20:16             ` Oleh Kravchenko
2019-08-14 20:53               ` Jacek Anaszewski [this message]
2019-08-14 20:58                 ` Oleh Kravchenko
2019-08-17 15:02               ` Pavel Machek
2019-08-20  7:46                 ` Oleh Kravchenko
2019-08-18 13:47   ` Jacek Anaszewski
2019-08-27 20:43     ` Oleh Kravchenko
2019-08-27 20:56       ` Jacek Anaszewski
2019-08-27 21:11         ` Oleh Kravchenko
2019-08-27 21:18           ` Jacek Anaszewski
2019-08-27 21:26             ` Oleh Kravchenko
2019-08-13 20:31 ` [PATCH v4 1/2] dt-bindings: Add docs for EL15203000 Dan Murphy
2019-08-14 19:54   ` Jacek Anaszewski
2019-08-18 13:41 ` Jacek Anaszewski
2019-08-20  7:50   ` Oleh Kravchenko

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