/*
   * board initialization should put one of these into dev->platform_data
   * and place the sl811hs onto platform_bus named "sl811-hcd".
   */
  
  struct sl811_platform_data {
  	unsigned	can_wakeup:1;
  
  	/* given port_power, msec/2 after power on till power good */
  	u8		potpg;
  
  	/* mA/2 power supplied on this port (max = default = 250) */
  	u8		power;
  
  	/* sl811 relies on an external source of VBUS current */
  	void 		(*port_power)(struct device *dev, int is_on);
  
  	/* pulse sl811 nRST (probably with a GPIO) */
  	void 		(*reset)(struct device *dev);
  
  	// some boards need something like these:
   	// int 		(*check_overcurrent)(struct device *dev);
   	// void 	(*clock_enable)(struct device *dev, int is_on);
  };