[KERNEL PATCH - Devs only] Force AC (fast) charging

[chad0989]

This is for kernel devs only. The patch 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 forum. This allows one to force AC charging for any charger that is detected as USB (i.e. car chargers, inductive chargers through the pogo pins). This also works for MHL, HOWEVER you will most likely still be limited by the MHL adapter itself. With modification to the MHL adapter (splice in an additional charger) plus this mod, bunklung was able to charge at ~600-700 mA while mirroring and streaming.

To toggle the fast charge you must download IncrediControl v1.5 beta3 (http://www.incredikernel.com under Latest Downloads). Under the general tab, click on force fast charge, then apply. After you have done that, place your phone on the charger. You will see it is now detected as AC and if and only if the charger can put out more current than it was previously being limited to (more than 500mA) you will be able to use the additional current.

Good luck have fun.

http://www.incredikernel.com/wp-con...nitor/download.php?id=force_fast_charge.patch

NOTE: You may get a freeze/FC in IncrediControl once in while when toggling the charge. This is being worked on. I figured everyone could deal with a FC here or there to get this out earlier.

Fast charge toggle widget. No more need to open the app to toggle!

https://play.google.com/store/apps/details?id=com.incredicontrol.fastchargewidget

 

[nosit1]

Great work. Now I just need to figure out how to patch the kernel! Haha. Hopefully someone will rebuild one with it in so I can test with my MHL adaptor.

Sent from my Galaxy Nexus using Tapatalk

 

[Natolx]

Thanks for this!

 

[refthemc]

Thanks Chad!

 

[TRusselo]

thats nice, i offered a similar kernel mod to the devs of a captivate kernel they tried telling me making the phone charge on usb the same speed as AC could dammage the battery, phone or pc. oh and they basically called me an idiot for suggesting it.

here is the captivate/i9000 kernel tweak for rapid AC charging

more info in original thread, bottom of 1st page to 2nd page. http://xdaforums.com/showthread.php?t=1384253

Voltage regulator and the charging current part: max8998-private.h, a file that contains charging values in mA:

#define MAX8998_ICHG_90        0
#define MAX8998_ICHG_380    1
#define MAX8998_ICHG_475    2
#define MAX8998_ICHG_550    3
#define MAX8998_ICHG_570    4
#define MAX8998_ICHG_600    5
#define MAX8998_ICHG_700    6
#define MAX8998_ICHG_800    7

Battery driver part: s5pc110_battery.c and defined AC and USB charging rates (modified by me to 800mA when on AC and 550mA on USB):

                      if (chg->cable_status == CABLE_TYPE_AC)
                max8998_write_reg(i2c, MAX8998_REG_CHGR1,
                    (MAX8998_TOPOFF_10    << MAX8998_SHIFT_TOPOFF) |
                    (MAX8998_RSTR_DISABLE    << MAX8998_SHIFT_RSTR) |
                    (MAX8998_ICHG_800    << MAX8998_SHIFT_ICHG));
            else if (chg->cable_status == CABLE_TYPE_USB)
                max8998_write_reg(i2c, MAX8998_REG_CHGR1,
                    (MAX8998_TOPOFF_25    << MAX8998_SHIFT_TOPOFF) |
                    (MAX8998_RSTR_DISABLE    << MAX8998_SHIFT_RSTR) |
                    (MAX8998_ICHG_550    << MAX8998_SHIFT_ICHG));

One more thing in i9000 kernel sources: drivers/usb/gadget/android.c

#ifdef CONFIG_USB_ANDROID_SAMSUNG_COMPOSITE
/* soonyong.cho : This value of max power is referred from S1 */
    [COLOR=Red].bMaxPower    = 0x30, /* 96ma */[/COLOR]
#else /* original */
    [COLOR=YellowGreen].bMaxPower    = 0xFA, /* 500ma */[/COLOR]
#endif /* CONFIG_USB_ANDROID_SAMSUNG_COMPOSITE

from where I removed the condition to make it look like that:

[COLOR=YellowGreen].bMaxPower    = 0xFA, /* 500ma */[/COLOR]

BEFORE:

AFTER:

 

[gamefreakgcb]

Will this work for GSM version also?

thats nice, i offered a similar kernel mod to the devs of a captivate kernel they tried telling me making the phone charge on usb the same speed as AC could dammage the battery, phone or pc. oh and they basically called me an idiot for suggesting it.

....

What do you use to monitor the mA on the PC side?

 

[Notn4]

is it supposed to show somewhere that i'm on ac? I have this patch enabled but when going into battery settings it shows "charging (USB)"

also TRusselo, where in windows can I find how much mA a USB device is drawing from the port?

 

[Natolx]

is it supposed to show somewhere that i'm on ac? I have this patch enabled but when going into battery settings it shows "charging (USB)"

also TRusselo, where in windows can I find how much mA a USB device is drawing from the port?

It needs to be activated. Ask the guy who makes the kernel you use

Sent from my Galaxy Nexus using Tapatalk

 

[chad0989]

is it supposed to show somewhere that i'm on ac? I have this patch enabled but when going into battery settings it shows "charging (USB)"

also TRusselo, where in windows can I find how much mA a USB device is drawing from the port?

To toggle the fast charge you must download IncrediControl v1.5 beta3 (http://www.incredikernel.com under Latest Downloads). Under the general tab, click on force fast charge, then apply. After you have done that, place your phone on the charger. You will see it is now detected as AC and if and only if the charger can put out more current than it was previously being limited to (more than 500mA) you will be able to use the additional current.

 

[mbush78]

Where is it

OK.... I give, what properties windows is that?

here is the captivate/i9000 kernel tweak for rapid AC charging

 

[chad0989]

Pushed the fastcharge toggle widget to the market for those who were interested. No more need to open an app to toggle when you can just do it from your homescreen!

https://play.google.com/store/apps/details?id=com.incredicontrol.fastchargewidget

 

[jcmm11]

Tried to download the toggle from Google play, but I'm getting a "device not compatible" banner.

Franco nightly kernel, rooted 4.0.4 (Craig Gomez). The patch is definitely in this kernel.

Thanks in advance. Great patch, by the way.

Sent from my Galaxy Nexus using XDA

 

[En4c3r]

Great work. Now I just need to figure out how to patch the kernel! Haha. Hopefully someone will rebuild one with it in so I can test with my MHL adaptor.

Same here using the bamf rom do I contact them on the bamf forums to compile this patch into the kernel? I am newb.

 

[nosit1]

Same here using the bamf rom do I contact them on the bamf forums to compile this patch into the kernel? I am newb.

I looked into it. I could have done it had I had enough time to read in and get the proper setup, but it's just a plain mess. I knew it would catch on fast.

 

[JetBomber117]

Glad to see you are spreading the love chad. This patch was a lifesaver on my incredible.

 

[Buddy Revell]

Pushed the fastcharge toggle widget to the market for those who were interested. No more need to open an app to toggle when you can just do it from your homescreen!

https://play.google.com/store/apps/details?id=com.incredicontrol.fastchargewidget

Nice work!

 

[chad0989]

Tried to download the toggle from Google play, but I'm getting a "device not compatible" banner.

Franco nightly kernel, rooted 4.0.4 (Craig Gomez). The patch is definitely in this kernel.

Thanks in advance. Great patch, by the way.

Sent from my Galaxy Nexus using XDA

You're getting it from the widget after its been downloaded, or from the market while trying to download it?

 

[chad0989]

Market issue fixed. Should be able to download now.

 

[chad0989]

Widget should be fixed now. Sorry about the FCs!

 

[goldlocke]

thx chad!
Is there a list which kernels already support HAVS or SVS?