[Trac #1420] Audio driver for AD1888 - power verification.

Jaya Kumar jayakumar.lkml at gmail.com
Sun May 6 23:56:56 EDT 2007

Yes, I've already implemented full suspend (PR0..6 + EAPD) in
cs5535audio and ad1888. See cs5535audio_pm.c and ac97_patch.c for

By the way, CONFIG_SND_AC97_POWER_SAVE is not enabled in your default
olpc-2.6 config. That will save additional power.


On 5/6/07, Zarro Boogs per Child <bugtracker at laptop.org> wrote:
> #1420: Audio driver for AD1888 - power verification.
> -------------------------+--------------------------------------------------
>  Reporter:  jg           |       Owner:  rsmith
>      Type:  enhancement  |      Status:  new
>  Priority:  normal       |   Milestone:  BTest-4
> Component:  kernel       |    Keywords:  power
> -------------------------+--------------------------------------------------
>  The Analog Devices AD1888 can disable all sections of itself it is not
>  using.  As it can drive 5.1 audio output, for example, it is important
>  that we verify that all but the stereo channels are disabled.
>  It also has a "deep sleep" feature, in which it can be entirely disabled.
>  If its device driver is closed, the AD1888 should be put into deep sleep,
>  and restored when the device opened.
> --
> Ticket URL: <http://dev.laptop.org/ticket/1420>
> One Laptop Per Child <http://laptop.org/>

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