Re: [PATCH v2 0/3] leds: blink resolution improvements

[Pavel Machek]

Hi!

> >>The following patches improve the precision of led
> >>timer trigger and add the delay unit control.
> >>That allows to make PWM brightness control with timer
> >>trigger.
> >Are you sure that is good idea? Doing LED pwm with main cpu is quite harsh...
> Do you remember the pc-speaker driver? :)

Actually yes, I do, and that one has the same interface as "normal"
sound cards.

> For the timer trigger I would pretty much like my approach to stay.
> The reason is that the PWM I need to do, is not strictly a PWM -
> it needs the ON period in range of tens or hundreds of milliseconds,
> while the OFF period is in a couple of usecs (or vice-versa). No

That is a PWM, right? I see why you'd want to have short "on", but I
don't see why you'd want short "off"...

There's one thing you have to do: having two files, one specifiying
units and second one specifying timeout is not going to work.

What about simply "echo 0.001 > delay_on"?

Thanks,
									Pavel

-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/