Kirkwood CPU Freq driver

[Adam Baker]

On 26/05/13 19:05, Jason Cooper wrote:
> On Sun, May 26, 2013 at 10:36:14AM +0200, Andrew Lunn wrote:
>> On Sat, May 25, 2013 at 10:32:04PM +0100, Adam Baker wrote:
>>> I've been trying to test Andrew Lunn's work creating a CPU Idle
>>> driver for Kirkwood.
>>
>> Thanks for testing this. I must admit, i never tested it once the
>> first rc came out. I clearly should of, because its broken. It was a
>> three part patch series, and only part 1/3 made it in. Hence the
>> issues you are seeing.
>>
>> Jason, please can you pick up:
>>
>> https://patchwork.kernel.org/patch/2051401/
>> https://patchwork.kernel.org/patch/2080931/
>
> Yep, got them in now.  Sorry for the mix up.
>

I've now tested with the first of these patches applied and the changes 
from the second added to my .config

To get it to work I had to follow the instructions in the Documentation 
to add the cpus entry to kirkwood.dtsi so I'll post that as a patch in a 
day or two but after doing that I have a working cpufreq driver.

Measuring the power consumption of my NAS server I observed a slight 
reduction in power consumption when the clock rate was reduced. I 
haven't yet measured for long enough to get an accurate measurement but 
it looks like maybe 1/4 W power saving.

Feel free to add

Tested-by: Adam Baker <linux at baker-net.org.uk>

Regards

Adam