Date: Thu, 10 Apr 2014 08:45:39 -0600 From: Ian Lepore <ian@FreeBSD.org> To: "Sulev-Madis Silber (ketas)" <madis555@hot.ee> Cc: freebsd-arm@FreeBSD.org, Xuebing Wang <xbing6list@gmail.com> Subject: Re: BeagleBone Black: Increase CPU frequency from 800MHz to 1GHz Message-ID: <1397141139.1124.46.camel@revolution.hippie.lan> In-Reply-To: <53460A6A.5080502@hot.ee> References: <533CA68E.1020602@gmail.com> <1396487123.81853.274.camel@revolution.hippie.lan> <53460A6A.5080502@hot.ee>
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On Thu, 2014-04-10 at 06:05 +0300, Sulev-Madis Silber (ketas) wrote: > On 2014-04-03 04:05, Ian Lepore wrote: > > On Thu, 2014-04-03 at 08:08 +0800, Xuebing Wang wrote: > >> Hi community, > >> > >> I am working on a small project to increase AM335x Cortex-A8 MPU > >> frequency from 800MHz to 1GHz. > >> > >> Would you please point to me which tree should I base my work on? Is it > >> current? > >> > >> I did notice that there is "projects/armv6", svn log under sys/arm/ti > >> shows the latest commit is "2012-08-15" > >> > > > > Definitely use -current. That projects branch was where the initial > > armv6 work was done long ago, but that was all merged to 10 and has now > > evolved into 11-current. > > > > I think very many Beaglebone users will be interested in your work, > > including me! > > > > -- Ian > > I worry that I might need heatsink on SoC when running 1GHz... I hope > this thing has proper thermal downscaling or other means of protection. > At 500MHz and under load, it's already too warm... the thing was sitting > on table with SoC side up. The original idea of running it inside > enclosed box doesn't seem so good anymore... On what basis are you declaring it "too warm"? Did you use an IR thermometer or something? The datasheet gives lifetime ratings with a junction temperature of 90c, I'll bet you're nowhere near that. -- Ian
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