Date: Sun, 29 Sep 2013 20:26:11 -0700 From: Tim Kientzle <kientzle@freebsd.org> To: Jia-Shiun Li <jiashiun@gmail.com> Cc: "freebsd-arm@freebsd.org" <freebsd-arm@freebsd.org>, ticso@cicely.de Subject: Re: BBB CPU clock (was: Re: FreeBSD on Cubieboard 2, UDOO and Galaxy Note 10.1 (Exynos). Message-ID: <B8966F22-1169-4FE5-B105-4D104909723E@freebsd.org> In-Reply-To: <CAHNYxxPtD5vgrohumwccoC_5bZv7fuV3RYK2vgLUpyEZCmOgqg@mail.gmail.com> References: <CAHNYxxPtD5vgrohumwccoC_5bZv7fuV3RYK2vgLUpyEZCmOgqg@mail.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
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