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       1  /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
       2  #ifndef __HPET__
       3  #define __HPET__
       4  
       5  
       6  
       7  
       8  struct hpet_info {
       9  	unsigned long hi_ireqfreq;	/* Hz */
      10  	unsigned long hi_flags;	/* information */
      11  	unsigned short hi_hpet;
      12  	unsigned short hi_timer;
      13  };
      14  
      15  #define HPET_INFO_PERIODIC	0x0010	/* periodic-capable comparator */
      16  
      17  #define	HPET_IE_ON	_IO('h', 0x01)	/* interrupt on */
      18  #define	HPET_IE_OFF	_IO('h', 0x02)	/* interrupt off */
      19  #define	HPET_INFO	_IOR('h', 0x03, struct hpet_info)
      20  #define	HPET_EPI	_IO('h', 0x04)	/* enable periodic */
      21  #define	HPET_DPI	_IO('h', 0x05)	/* disable periodic */
      22  #define	HPET_IRQFREQ	_IOW('h', 0x6, unsigned long)	/* IRQFREQ usec */
      23  
      24  #define MAX_HPET_TBS	8		/* maximum hpet timer blocks */
      25  
      26  #endif /* __HPET__ */