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

Oleh Kravchenko
2019-08-14T19:46:50Z

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Hello Jacek,

14.08.19 21:18, Jacek Anaszewski пише:
>>> 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?
>>>
>>
>> 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.

>>>> +
>>>> + 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"
>>>
>>
>> Should I cut this patterns to smaller? Or let keep it?
>>
>
> For the first two we could do without sequence duplication.

Ok, I will reduce it.

--
Best regards,
Oleh Kravchenko

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