GPIOF_EXPORT_CHANGEABLE 55 drivers/gpio/gpiolib-legacy.c err = gpiod_export(desc, flags & GPIOF_EXPORT_CHANGEABLE); GPIOF_EXPORT_CHANGEABLE 42 include/linux/gpio.h #define GPIOF_EXPORT_DIR_CHANGEABLE (GPIOF_EXPORT | GPIOF_EXPORT_CHANGEABLE)