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 git.ti.com: 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:

drivers/power/supply/bq27xxx_battery.c

drivers/power/supply/bq27xxx_battery_i2c.c

drivers/power/supply/bq27xxx_battery_hdq.c

include/linux/power/bq27xxx_battery.h

Source Files

drivers/power/supply/bq27xxx_battery.c

drivers/power/supply/bq27xxx_battery_i2c.c

drivers/power/supply/bq27xxx_battery_hdq.c

Other Files

include/linux/power/bq27xxx_battery.h

Enabling Driver Support

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

Menuconfig Location

Symbol: BATTERY_BQ27XXX [=y]

Type : tristate

Prompt: 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 : boolean

Prompt: 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 : tristate

Prompt: 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 : tristate

Prompt: 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 this

driver please either

1. Send the patches to the relevant Linux Kernel community as listed in the maintainers file located: Here

or

2. Contact your TI representative.