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kernel/linux-rt-4.4.41/include/linux/platform_data/pxa2xx_udc.h 944 Bytes
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  /*
   * This supports machine-specific differences in how the PXA2xx
   * USB Device Controller (UDC) is wired.
   *
   * It is set in linux/arch/arm/mach-pxa/<machine>.c or in
   * linux/arch/mach-ixp4xx/<machine>.c and used in
   * the probe routine of linux/drivers/usb/gadget/pxa2xx_udc.c
   */
  #ifndef PXA2XX_UDC_H
  #define PXA2XX_UDC_H
  
  struct pxa2xx_udc_mach_info {
          int  (*udc_is_connected)(void);		/* do we see host? */
          void (*udc_command)(int cmd);
  #define	PXA2XX_UDC_CMD_CONNECT		0	/* let host see us */
  #define	PXA2XX_UDC_CMD_DISCONNECT	1	/* so host won't see us */
  
  	/* Boards following the design guidelines in the developer's manual,
  	 * with on-chip GPIOs not Lubbock's weird hardware, can have a sane
  	 * VBUS IRQ and omit the methods above.  Store the GPIO number
  	 * here.  Note that sometimes the signals go through inverters...
  	 */
  	bool	gpio_pullup_inverted;
  	int	gpio_pullup;			/* high == pullup activated */
  };
  
  #endif