export->child.release = pwm_export_release;
export->child.parent = parent;
export->child.devt = MKDEV(0, 0);
export->child.release = pwm_export_release;
export->child.parent = parent;
export->child.devt = MKDEV(0, 0);
dev_set_name(&export->child, "pwm%u", pwm->hwpwm);
ret = device_register(&export->child);
dev_set_name(&export->child, "pwm%u", pwm->hwpwm);
ret = device_register(&export->child);