[KERNEL PATCH] Force AC (fast) Charging

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This is for kernel devs only. The patch itself is useless to those who do not/can not compile their own kernel.

I put together this patch for you guys at the request of a few different members here in the nexus S forum who had saw my patch in the gnex forum. This allows one to force AC charging for any charger that is detected as USB (e.g. many car chargers) and pull the full current the charger can support. It also provides additional security when connecting to public charging stations because by forcing AC charging, USB/adb data transfers are disabled, protecting your data.

Fast charge can be toggled by issuing:

echo 1 > /sys/kernel/fast_charge/force_fast_charge

and off:

echo 0 > /sys/kernel/fast_charge/force_fast_charge

Some roms (AOKP) have also implemented toggles.

In addition I have created a toggle fast charge widget that may be used to toggle fast charge on and off right from your home screen:

https://play.google.com/store/apps/d...stchargewidget

For the widget (or any fast charge toggle) to work, you MUST be running a kernel that has this patch implemented.

As a good gesture to support a fellow dev, I ask that if you implement the patch into your kernel, please link to my widget as one means to toggle it. You are of course free to provide other ways to toggle it as well if you so desire.

Kernel devs, if you would like to test the widget yourself to confirm its working, and for convenience of testing, please contact me and I will provide you with a copy. You must show that you are a kernel dev though (i.e. link me to your kernel post so I can match your username).

Here you go. Good luck have fun:
http://www.incredikernel.com/wp-cont...t_charge.patch

Hopefully we will see this implemented into a lot of our kernels around here. It looks pretty sweet. If I knew how to compile kernels I'd be all over it.

Sent from my Nexus S 4G using xda premium

Thanks! I'd like to see this also!

Its been brought to my attention that the AOKP toggle interferes in some way with the widget. I'm going to contact them and see what's up. I think they may be setting the permissions of the fast charge toggle in an undesirable manner.

thank you x 1million!!! I requested this from mathkid about two weeks ago & never heard anything back....I hope this gets implemented now

Originally Posted by hp420

thank you x 1million!!! I requested this from mathkid about two weeks ago & never heard anything back....I hope this gets implemented now

Yup, I remember that and now its here to add! Looking forward to this

Sent from my SPH-D710 using xda premium

Originally Posted by hp420

thank you x 1million!!! I requested this from mathkid about two weeks ago & never heard anything back....I hope this gets implemented now

He messaged me and it took me a couple weeks to get around to it. Haha

Sent from my ADR6425LVW using XDA

Originally Posted by chad0989

He messaged me and it took me a couple weeks to get around to it. Haha

Sent from my ADR6425LVW using XDA

ahh, thanks for the response I'll write him and thank him for his part in researching this for matrix kernel.

any kernels on the nexus s 4g support fast charge? I cant wait to get this working! Great job!

I've always had a problem of GPS draining my phones battery no matter what ROM I'm running, or what car charger I use, been through about 5 of them. If this helps with that I'm super stoked about this, since it's the only thing that I don't like about my Nexus S.