#include static void __tpcap_default_set_speed(struct device* dev, speed_t speed) { } static void __tpcap_default_set_baseclk(struct device* dev, unsigned int base) { } static void __tpcap_default_set_cntrl_mode(struct device* dev, tcflag_t cflag) { } struct termport_pot_ops default_termport_pot_ops = { .set_cntrl_mode = __tpcap_default_set_cntrl_mode, .set_clkbase = __tpcap_default_set_baseclk, .set_speed = __tpcap_default_set_speed };