Gpio: struct gpio_chip set_multiple and get_multiple

[Subhashini Rao Beerisetty <subhashbeerisetty@xxxxxxxxx>]

Hi All,


struct gpio_chip {

  int (*get_multiple)(struct gpio_chip *chip,unsigned long *mask,
unsigned long *bits);

  void (*set_multiple)(struct gpio_chip *chip,unsigned long *mask,
unsigned long *bits);

}

struct gpio_chip provides set_multiple callback to assign output
values for multiple signals defined by “mask” and similarly it has
get_multiple callback to read values for multiple signals defined by
“mask” and stores them in “bits”.


 I’m using deprecated sysfs interface (/sys/class/gpio/gpiochipN –
v4.4 kernel), in this kernel version I could not find any userspace
control to achieve to output values for multiple PIO’s and similarly
to read multiple PIO’s. Can someone clarify me on this?


Thanks,