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Original question:

Linux/TCA9539: regarding tca9539 io expander

Compiler/TCA9539: TCA9539 DT sysfs entries for gpio missing

ASHVAK SYED
Prodigy 10 points
Part Number: TCA9539


Tool/software: TI C/C++ Compiler

Hi,

I am configuring the device tree for tca9539 as below:

i2c 1{
status = "ok";

ioexp: gpio@74 {
compatible = "ti,tca9539";
reg = <0x74>;
interrupt-parent = <&tlmm>;
gpio-controller;
#gpio-cells = <2>;
};

};

I dont see the system creates a sysfs entry for the I/O Expander GPIO controller.

Do I need to change any driver in this case or is there any problem in the device tree?

Any suggestions are appreciated.

Thank you,

Syed.

  • 0
    TI__Guru 62920 points

    Hello Syed,

    This forum is primarily for hardware support regarding our ICs and is monitored by a team of applications engineers with analog expertise.  Unfortunately I'm not sure we have the software background to provide much support to a code configuration issue like this.  Are you using a TI microcontroller/processor?  If so maybe I could loop the appropriate team in to help.

    Max