Some phones do have one of the fuel gauge ic's. The phone I do most of my hacking on is the HTC Touch Pro2 which does not have one. I wrote some software for doing periodic measurements of voltage and current and then doing some math to try and calculate the battery state. Basically a luenberg observer. Code is here https://gitorious.org/scbs/scbs includes some kernel patches for doing the periodic measurements.
Regards, Jon Pry 2012/1/3 Hemanth(ヘマント) <hemanth....@gmail.com>: > Hi, > > I think some of the information that you are looking for might be > proprietary. > For almost anything MSM related, a good place to start is codeaurora. > > Some platforms do use the standalone ICs (bq27xxx) > https://www.codeaurora.org/gitweb/quic/le/?p=kernel/msm.git;a=commitdiff;h=339f30bc1ad4adaf3a05fae0abd21cc3afab6c44 > You can check your defconfig to see which of the "CONFIG_BATTERY_XXX" > are being used. > > For the battery related RPC, you can check the code here: > https://www.codeaurora.org/gitweb/quic/le/?p=kernel/msm.git;a=blob;f=drivers/power/msm_battery.c;h=055539934e4ea247b56bec7b70c28fa04d37ff57;hb=98f5fd413f051db8407a53f583a46a1c3fb99657 > > As for the RPC operation itself, you can see the code on linux side > from arch/arm/mach-msm. > It's a bit hard to parse.. > > On Dec 27 2011, 2:34 pm, Pei Wang <uraj...@gmail.com> wrote: >> Hi, >> >> I am now trying to do something to make the kernel be better at >> tracking energy consumption, and I am using HTC Incredible 2 as my >> development device. However, I got confused when dealing with MSM >> platform. I just cannot understand how MSM chipsets implement battery >> fuel gauge. It seems that phones based on MSM processors do not use >> any individual fuel gauge IC such as MAX17042 or DS2784. I guess that >> MSM processors have their own fuel gauge IC integrated in the >> chipsets, and communicate with these IC via MSM RPC, but I am not sure >> for this. In fact, I don't know what MSM RPC is and how it works >> either. >> >> So in sum my question is how MSM based phone sense battery voltage and >> current? Besides that, materials introducing MSM RPC will also be >> helpful. Can anybody give me some instructions on how to get the >> answer? Thanks in advance. >> >> Best Regards, >> Pei Wang > > -- > unsubscribe: android-kernel+unsubscr...@googlegroups.com > website: http://groups.google.com/group/android-kernel -- unsubscribe: android-kernel+unsubscr...@googlegroups.com website: http://groups.google.com/group/android-kernel
