Application of bq27441-g1 with 3.X Linux kernel

Hi Ivan,

bq27441 has the same register mapping as bq27421, which is covered in the driver you mentioned above.
If you go to this page: processors.wiki.ti.com/.../Android_Software_Solutions_for_TI_Single-cell_Gas_Gauges
You can find a link to not only the driver, but also a utility called bqTool which you can use to configure the gauge from a .gm.fs Flashstream file, a special .gg.csv file or with other methods. You can use the Golden Image tab in bqStudio to generate a .gm.fs file.

What it does:
 
In addition to the regular reporting functions (Voltage(), Current(), SOC() etc.) this driver has APIs for reading and writing the DM of the gauge. These APIs are in turn used for initializing the DM of ROM based gauges.
The initialization happens at startup(about ~65s into the the startup) After startup we poll the status of ITPOR every 6 minutes and repeat the DM initialization if it’s set. The polling happens along with the polling of other parameters such as Current(), SOC() etc and the period for this polling loop is customizable.
The registers to initialized in the DM may be specified in the code in an array like this:
 
static struct dm_reg bq274xx_dm_regs[] = { {82, 0, 2, 1000}, /* Qmax */ {82, 5, 1, 0x81}, /* Load Select */ {82, 10, 2, 1340}, /* Design Capacity */ {82, 12, 2, 3700}, /* Design Energy */ {82, 16, 2, 3250}, /* Terminate Voltage */ {82, 27, 2, 110}, /* Taper rate */ };
 
What it doesn’t:
 
It doesn’t have a mechanism to save and restore Ra values and Qmax as suggested in the Quick Start Guide. This means it will reload default values every time the battery is inserted.