[alsa-devel] [PATCH RFC 1/3] ASoC: uda1380: use callbacks instead of gpiolib
anarsoul at gmail.com
Mon Jun 28 14:00:13 CEST 2010
В сообщении от 26 июня 2010 23:57:42 автор Mark Brown написал:
> On 26 Jun 2010, at 21:53, Vasily Khoruzhick wrote:
> > В сообщении от 26 июня 2010 23:09:39 автор Mark Brown написал:
> >> The regulator API isn't massively complex either and it does provide a
> >> standard abstraction for controlling power which seems like it might be
> >> useful here, though given the (frankly rather odd) fiddling with clocks
> >> your callback does perhaps it won't help.
> > Ok, but I still don't like idea about keeping both regulator and gpio
> > stuff.
> If you're going to the regulator API it's probably OK to remove the GPIO
> stuff since the regulator API supports GPIO controlled regulators already.
> Does mean transitioning the existing drivers but it means everyone shares
> the same code.
Actually, power on sequence on rx1950 (and on magician) looks like following:
1. set power pin to 1
2. set reset pin to 1
3. wait a bit (1ms or so)
4. set reset pin to 0
Reset right after power on is necessary at least on rx1950 (otherwise codec
doesn't respond on i2c).
Fixed regulator doesn't support that logic now, and I don't want to mix
gpio/regulator stuff in uda1380 driver. Does it makes sense to implement
another fixed-like regulator just for uda1380?
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