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linux driver for tps 650240

Heiko Stuebner
Prodigy 50 points
Other Parts Discussed in Thread: TPS650240, TPS65023, BQ24022

Hi,

 

does a Linux driver for the tps650240 as used in the Qisda ebook-readers exist somewhere?

The Linux kernel seems only to contain a driver tps65023.

Thanks

Heiko

  • 0
    TI__Prodigy 385 points

    Heiko,

     

    There is not a Linux driver available for the TPS650240. We are in the process of improving driver support for devices with communication engines, as the interface is controlled. For a device like the TPS650240, which depends on GPIOs of an available system processor, a Linux driver would have to be modified for whatever GPIOs were selected in the system to control the pins.

    May I ask what you are hoping the driver for the TPS650240 would do specifically?

    Thanks,

    Todd

  • 0 in reply to Todd Vanyo
    Prodigy 50 points

    Hi,

    for devices connected via GPIOs it seems the way to go is via a machine-info struct which is filled with the correct GPIO-information in the board-definition. See drivers/regulator/bq24022.c, include/linux/regulator/bq24022.h and the corresponding arch/arm/mach-pxa/hx4700.c:720 in your favorite linux tree for one example of this for the bq24022 charger.

    As for the use-case ... at the moment we are still analyzing our device (qisda ebook reader family) but it should probably do the same things the tps65023 does for the arch/arm/mach-davinci/board-mityomapl138.c (i.e. control the LDOs ...) which seems quite similar from a specs side to the tps650240.

     

    Thanks

    Heiko