From: Tony Lindgren <tony@atomide.com>
To: Ran Shalit <ranshalit@gmail.com>
Cc: linux-omap@vger.kernel.org
Subject: Re: Fail to enter retention
Date: Mon, 17 Nov 2014 10:09:46 -0800 [thread overview]
Message-ID: <20141117180944.GG7046@atomide.com> (raw)
In-Reply-To: <CAJ2oMh+t-Wahe=CTbrZQ=C2X-0n_x6FSzhwA6opyzhDFvJXdZg@mail.gmail.com>
* Ran Shalit <ranshalit@gmail.com> [141117 09:14]:
> Hi Tony,
>
> Thanks very much for suggestions,
> I am able to wakeup the uart (though it takes about 10 seconds till it wakeup).
The wake-up should happen within few hundred milliseconds at most.
Sounds like you're waking on some timer event instead.
> Do you have any suggestion, how I can understnad why it did not get
> into retention and how to continue from this point ?
You need to look if you have some devices blocking deeper
idle states in cm_idlest*_core and cm_idlest_per registers.
The device will automatically idle whatever it can if there
are no blockers. I believe at least EHCI still is blocking,
and MUSB if configured and cable connected.
Regards,
Tony
next prev parent reply other threads:[~2014-11-17 18:10 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-11-16 20:10 Fail to enter retention Ran Shalit
2014-11-17 16:22 ` Tony Lindgren
2014-11-17 17:12 ` Ran Shalit
2014-11-17 18:09 ` Tony Lindgren [this message]
2014-11-17 19:46 ` Ran Shalit
2014-11-17 20:38 ` Tony Lindgren
2014-11-17 21:09 ` Ran Shalit
2014-11-18 8:21 ` Ran Shalit
2014-11-18 8:25 ` Ran Shalit
2014-11-18 15:45 ` Tony Lindgren
[not found] ` <CAJ2oMhJUNsKtP1VYF+6dWDfmAEF3qvfbN7ahhVBdDBgZt7thGA@mail.gmail.com>
2014-11-18 21:47 ` Ran Shalit
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