[alsa-devel] [PATCH 1/4] ASOC: tegra: move AC97 clock defines to the controller node

[Mark Brown]

On Mon, Jul 22, 2013 at 06:26:20PM +0200, Lucas Stach wrote:
> Am Montag, den 22.07.2013, 10:46 +0100 schrieb Mark Brown:
> > On Mon, Jul 22, 2013 at 09:08:47AM +0200, Lucas Stach wrote:

> > > The clocks used by the Tegra ASoC utils were defined in the machine
> > > driver DT node for all boards, as this is were they get requested by the
> > > I2C and SPDIF Tegra audio drivers. Differently from those two the AC97

> > Why is the way the other devices are doing this sensible?

> Because they only need those clocks when actually playing audio, so
> requesting them late in the process when loading the machine driver is
> perfectly fine for them. The AC97 controller however already needs those
> clocks when initializing the controller and codec, so it has to request
> them earlier.

But why does it make sense to do that?  The clocks are directly
connected to the IP blocks in hardware after all..
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 836 bytes
Desc: Digital signature
URL: <http://mailman.alsa-project.org/pipermail/alsa-devel/attachments/20130724/a2fbce4b/attachment.sig>