mraa_result_t (*aio_init_pre) (unsigned int aio);
mraa_result_t (*aio_init_post) (mraa_aio_context dev);
+ mraa_pwm_context (*pwm_init_replace) (int pin);
mraa_result_t (*pwm_init_pre) (int pin);
mraa_result_t (*pwm_init_post) (mraa_pwm_context pwm);
mraa_result_t (*pwm_period_replace) (mraa_pwm_context dev, int period);