Linux Driver for LM3532
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Description & Features

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The Linux driver supports the LMU(Lighting Management Unit) devices for smartphone handsets. The Linux driver supports communication through the I2C bus and interfaces with various sub-systems.


Linux Mainline Status

Available in Linux Main line: No
Available through

Supported Devices:

  • lm3532
  • lm36272
  • lm3631
  • lm3632
  • lm3695
  • lm3697


Linux Source Files

The files associated with this device are:

  1. drivers/mfd/ti-lmu.c
  2. drivers/regulator/lm363x-regulator.c
  3. drivers/video/backlight/ti-lmu-backlight-core.c
  4. drivers/video/backlight/ti-lmu-backlight-data.c
  5. Documentation/devicetree/bindings/mfd/ti-lmu.txt
  6. Documentation/devicetree/bindings/regulator/lm363x-regulator.txt
  7. Documentation/devicetree/bindings/video/backlight/ti-lmu-backlight.txt
  8. include/linux/mfd/ti-lmu.h
  9. include/linux/mfd/ti-lmu-register.h
  10. include/linux/mfd/ti-lmu-backlight.h

Source Files


Linux Device Tree Documenation


Other Files



Enabling Driver Support

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

Menuconfig Location

Symbol: REGULATOR_LM363X [=y]
Type  : tristate
Prompt: TI LM363X voltage regulators
    -> Device Drivers
      -> Voltage and Current Regulator Support (REGULATOR [=y])
  Defined at drivers/regulator/Kconfig:294
  Depends on: REGULATOR [=y] && MFD_TI_LMU

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


2.  Contact your TI representative.



TI Devices (5)

Part Number Name Product Family
LM3532  High efficiency white LED driver with programmable Ambient Light Sensing Capability and I2C Compati  LED drivers 
LM36272  Two-channel LCD backlight and Bias power  LED drivers 
LM3631  Integrated WLED backlight driver and Bias power for LCD panels  LED drivers 
LM3632A  Single-chip backlight with Bias power and 1.5-A flash LED driver  LED drivers 
LM3697  3 String backlight driver with 11-bits of Exponential dimming  LED drivers 

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