Hi,
In my understanding,
If your device is bq27541 then you can use the "bq27541_battery.c" located at "drivers/power"
I think "bq27541_battery.c" file is specifically to bq27541 IC and it is not generic as "bq27x00_battery.c"
It seems the driver implemented for tegra devices (NVIDIA)
So you need to add platform data for "bq27541" in your board file.
What is your SOC name (processor) ?