[oe] hawkboard at 456 Mhz?

Koen Kooi k.kooi at student.utwente.nl
Sun Mar 21 14:42:19 UTC 2010

Hash: SHA1

On 21-03-10 13:57, Frans Meulenbroeks wrote:
> Hi,
> In the openembedded repository I saw the following patch:
> http://cgit.openembedded.org/cgit.cgi/openembedded/tree/recipes/linux/linux-davinci/da850_omapl138_opp456mhz.patch
> This seems to suggest that it is possible to run the hawkboard at 456
> Mhz (and yeah: I know it is out of spec and out of warranty, but for
> an experiment it would be quite helpful for me).
> I've build the kernel with openembedded, the patch is applied,
> CONF_CPU_FREQ is defined, but the control hook in /sys is not there.
> I've also tried tweaking the file with the settings (ds850.c) but to no avail.
> Anyone a suggestion on how to get this done?

You need a newer kernel that doesn't rely on the TPS part for cpufreq
(hawkboard lacks a PMIC, the evm uses the TPS). You can build from the
ti/staging[1] branch to get such a kernel.

Or wait a week for that branch to get merge, internal testing is finally
wrapping up.

[1] http://gitorious.org/angstrom/openembedded/commits/ti/staging
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