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X8Overclock | v004 - Multiple freq | X8 | X10 mini | X10 mini pro | 11-04-11

XPERIA X8 Android Development - xda-developers - forum.xda-developers.com
Rom cookers: if you include this module in your ROM, please make a link to this post in your release post, so your users can know how to work with it and update the module themselves

Intro: (dev post)

Since the X10 kernel is working, we might have a hope that someday we will have our custom kernels. If we can have custom kernels, we can do the overclocking easily.

Until that day, we will still have to overclock with modules. To make overclocking works with our current kernel, as far as I can see, we need to do the following things:

1. Patch cpufreq data to change maximum reported freq (these value will be read by Android for further controls). cpufreq will then call the low-level acpuclock functions to change real cpu freq.

2. Patch acpuclock data + code to change real cpu freq.

Right now I'm working a proof-of-concept module, with finished 1 and half of 2. I will need to patch acpuclock code in the running kernel to make the frequency applicable.

That means, right now, Android reported that I have a 800MHz MSM7227, although it's running at 600MHz, and cpufreq's governor accepts to change to the maximum 800MHz (it's 600MHz for real). We will need to patch acpuclock code to change PLL and apply the correct divisor.

Source on github :


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