Linux Driver for BQ27XXX



The Linux driver supports the BQ27x series of Battery Fuel Gauges. The Linux driver supports communication through the I2C/HDQ bus and interfaces with the power supply sub-system to monitor battery properties.


Linux Mainline Status

Available in Linux Main line: Yes
Available through N/A

Supported Devices:

  • bq27200
  • bq27210
  • bq27500
  • bq27510
  • bq27520
  • bq27521
  • bq27530
  • bq27531
  • bq27541
  • bq27542
  • bq27546
  • bq27742
  • bq27545
  • bq27421
  • bq27425
  • bq27441
  • bq27621


Linux Source Files

The files associated with this device are:

  1. drivers/power/supply/bq27xxx_battery.c
  2. drivers/power/supply/bq27xxx_battery_i2c.c
  3. drivers/power/supply/bq27xxx_battery_hdq.c
  4. include/linux/power/bq27xxx_battery.h

Source Files


Other Files



Enabling Driver Support

Configure kernel with "make menuconfig" (alternatively use "make xconfig" or "make nconfig")

Menuconfig Location

Symbol: BATTERY_BQ27XXX [=y]Type  : tristatePrompt: BQ27xxx battery driver  Location:    -> Device Drivers      -> Power supply class support (POWER_SUPPLY [=y])  Defined at drivers/power/supply/Kconfig:187  Depends on: POWER_SUPPLY [=y]Symbol: BATTERY_BQ27XXX_DT_UPDATES_NVM [=y]Type  : booleanPrompt: BQ27xxx support for update of NVM/flash data memory  Location:    -> Device Drivers      -> Power supply class support (POWER_SUPPLY [=y])  Defined at drivers/power/supply/Kconfig:210  Depends on: POWER_SUPPLY [=y] && BATTERY_BQ27XXX_I2C [=y]Symbol: BATTERY_BQ27XXX_HDQ [=y]Type  : tristatePrompt: BQ27xxx HDQ support  Location:    -> Device Drivers      -> Power supply class support (POWER_SUPPLY [=y])        -> BQ27xxx battery driver (BATTERY_BQ27XXX [=y])  Defined at drivers/power/supply/Kconfig:201  Depends on: POWER_SUPPLY [=y] && BATTERY_BQ27XXX [=y] && W1 [=y]Symbol: BATTERY_BQ27XXX_I2C [=y]Type  : tristatePrompt: BQ27xxx I2C support  Location:    -> Device Drivers      -> Power supply class support (POWER_SUPPLY [=y])        -> BQ27xxx battery driver (BATTERY_BQ27XXX [=y])  Defined at drivers/power/supply/Kconfig:192  Depends on: POWER_SUPPLY [=y] && BATTERY_BQ27XXX [=y] && I2C [=y]

Fixes and Code Enhancements

If there are fixes and or code enhancements that need to be added to thisdriver please either1. Send the patches to the relevant Linux Kernel community as listed in the maintainers file located: Hereor2.  Contact your TI representative.


Battery fuel gauges
BQ27200 Single-Cell Li-Ion and Li-Pol Battery Gas Gauge IC with I2C Interface BQ27210 Li-ion and Li-pol battery gas gauge IC for portable applications with I2C BQ27421-G1 System-side(tm) fuel gauge with integrated Sense Resistor | battery gas gauge BQ27425-G1 System-side Impedance Track™; fuel gauge with direct battery connection | gas gauge battery BQ27426 Single cell System-side battery fuel (gas) gauge w/Pre-programmed chemistry Profile BQ27427 Single-cell battery fuel gauge with pre-programmed chemistry and integrated sense resistor BQ27441-G1 System-side Impedance Track™ battery fuel (gas) gauge BQ27530-G1 System-side Impedance-Track fuel (gas) gauge with direct battery connection BQ27531-G1 Battery management unit Impedance Track™ fuel (gas) gauge for bq2419x charger controller BQ27546-G1 Single cell Impedance Track™ pack side fuel gauge with DSBGA package BQ27621-G1 System-side fuel gauge with Dynamic Voltage Correlation, battery gas gauge BQ27742-G1 Single cell Li-ion battery fuel gauge with integrated protection | battery gas gauge
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