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,
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