Hi,

 

I would like to know how to add new function to a driver in Linux Framework?

 

For eg: In GPIO driver, there is gpio_chip structure defined.

 

static struct gpio_chip mygpio_chip = {
        .label                         = "mygpio",
        .owner                        = THIS_MODULE,
        .direction_input           = mygpio_direction_input,
        .get                            = mygpio_get,
        .direction_output         = mygpio_direction_output,
        .set                            = mygpio_set,
        .to_irq                        = mygpio_to_irq,
};

If i want to add mygpio_pulldown or mygpio_altfunc to support few more gpio functionalities, how and where can i add these functions in the structure?

 

Any suggestions on this will be appreciated.

 

Thanks in advance,

Asha