[alsa-devel] [PATCH 3/4] ALSA: pxa27x: ac97 controller driver requests gpio

Mike Dunn mikedunn at newsguy.com
Mon Jan 7 17:40:01 CET 2013

On 01/07/2013 07:38 AM, Igor Grinberg wrote:
> On 01/07/13 16:10, Mike Dunn wrote:


>> Well, I won't make a fuss on this point, but with code that runs very
>> infrequently, I thought that the cost of a call to gpio_direction_output() was
>> worth the clarity and insurance.
> This is not about how frequent the code runs, but the fact that the arch code
> relies on sound code (outside of arch) to request the GPIO for it.
> I would recommend to place the GPIO request call along with the
> direction/value calls - in the same subsystem.

OK.  This is in some shared pxa code called by the ac97 driver during
initialization, where I earlier placed the gpio_request() calls only.

> Also, the patch ordering is not good:
> patch 2 drives the GPIO, and patch 3 requests it,
> whereas it should be the other way around, so I would recommend to
> combine both into one.



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