devm_of_pwm_get — 
     resource managed of_pwm_get
 
| struct pwm_device * devm_of_pwm_get ( | struct device * dev, | 
| struct device_node * np, | |
| const char * con_id ); | 
   This function performs like of_pwm_get but the acquired PWM device will
   automatically be released on driver detach.