Merge Existing Code Request - USB OTG-Y Charging Support

[sunbladehub]

Would it be possible to include support for OTG-Y charging? The code has already been written by sollapse (source here) and greatly improved by Phoenix Wright (source link is broken)

OTG-Y charging enables people to use OTG devices for long periods of time without draining their battery - instead it charges! I have some experience coding in C++/Java (mostly closed source for work) but no kernel experience. If there is anything you need help with let me know. Thanks!

Background note: I have flashed Phoenix Wright's latest kernel zip on the latest sultanxda CM13 ROM and OTG-Y does work but the UI is janky and feels 10x slower. No jank and fast responsive UI is observed after flashing Phoenix Wright's kernel on top of cm-13.0-20160104-UNOFFICIAL-Sultan-bacon.zip. The jank is present if flashed on cm-13.0-ZNH2K-20160603-STABLE-Sultan-bacon.zip.

[sunbladehub]

For what it is worth, I performed a bisect to identify the offending cm-13.0-XXXXXXXX-UNOFFICIAL-Sultan-bacon build for stable OTG-Y support. Here are the results after flashing Phoenix Wright's kernel on top:

STABLE: cm-13.0-ZNH2K-20160423-STABLE-Sultan-bacon.zip
UNSTABLE: cm-13.0-ZNH2K-20160430-STABLE-Sultan-bacon.zip

So for anyone who is interested in OTG-Y support you can get it on the OPO with Sultan's ROM, providing you are ok with forfeiting a year's worth of ROM development.

If anybody can identify what code change might have lead to the jank/sluggishness I'd be interested to know.