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Subject: Re: BBB CPU clock (was: Re: FreeBSD on Cubieboard 2,
 UDOO and Galaxy Note 10.1 (Exynos).
From: Tim Kientzle <kientzle@freebsd.org>
In-Reply-To: <CAHNYxxPtD5vgrohumwccoC_5bZv7fuV3RYK2vgLUpyEZCmOgqg@mail.gmail.com>
Date: Sun, 29 Sep 2013 20:26:11 -0700
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References: <CAHNYxxPtD5vgrohumwccoC_5bZv7fuV3RYK2vgLUpyEZCmOgqg@mail.gmail.com>
To: Jia-Shiun Li <jiashiun@gmail.com>
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On Sep 29, 2013, at 9:41 AM, Jia-Shiun Li <jiashiun@gmail.com> wrote:
>=20
> According the the manual, the PMIC does not seems to do too much =
different
> between two power supply sources.
> Only that USB input has lower current limit, and AC is preferred when
> both are connected.

My understanding:

  * We should query the PMIC to determine whether we're running from 5V =
supply or USB.

   * Based on that, we should adjust the CPU clocks.  We should be able =
to run 1GHz from 5v supply.

Connecting cpufreq would be a nice addition.

Tim