[alsa-devel] [PATCH RFC 1/3] ASoC: uda1380: use callbacks instead of gpiolib

Vasily Khoruzhick anarsoul at gmail.com
Mon Jun 28 16:25:25 CEST 2010

В сообщении от 28 июня 2010 17:15:40 автор Mark Brown написал:

> What I'm trying to figure out is if the GPIO is wired directly to the
> UDA1380 or if this is controlling something external to the UDA1380
> which these designs just happen to have copied.  If it's a direct
> connection to the UDA1380 then using GPIOs directly is perfectly
> sensible.

I'm not sure if s3c24xx GPIOs can drive UDA1380 directly. I suspect it's wired 
to the gate of some transistor (FET - is it right term to use here? :)) to 
handle higher current (sorry, English is not my native language, and it's hard 
to explain schematic-specific things, that's not my field :)). Btw, I'm sure 
that there's no any external power-control chip, maybe just single transistor.

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