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Dual-core & some battery save CPU script

https://github.com/remcoros/sensation-dual-core-patch

Current behaviour:

- first check for existence of /system/etc/virtuous_oc/wake_max_freq

if found, asume oc daemon found and exit.

when awake:

- if we wake from earlier sleep, set cpu0 to the remembered cpu0 frequency

- sets cpu1 online with scaling_max_freq same as cpu0, enforcing governor ondemand

when sleeping:

- remember current cpu0 frequency

- sets cpu1 offline

To enable debugging (log to /devlog/dual_core):

echo 1 > /system/etc/dual_core/debug

use dcbsp-control to see some stats and enable/disable debug.

note, this should all be temporary. I think the kernel should handle all this properly.

based on original script by mike1986 (http://forum.xda-developers.com/showthread.php?t=1098849)

heavily mod by remcoros

1.3: small bug in control script

1.2: added /system/xbin/dcbsp-control Use this to view settings. enable/disable debug, view log, etc.

1.1: fix issue with cpu1 always set to boot frequency (not always the same as current cpu0)

1.0: Standalone patch on github

0.8: cpu1 governor lock

0.7: detect oc daemon, reformat code, writable settings/log, better handle awake when 3rd party sets frequencies, extensive logging (when enabled)

0.6: rewrite

0.5: mike1986's script

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