#define HPET_EPI _IO('h', 0x04) /* enable periodic */
#define HPET_DPI _IO('h', 0x05) /* disable periodic */
#define HPET_IRQFREQ _IOW('h', 0x6, unsigned long) /* IRQFREQ usec */
+#define HPET_ALLOC_TIMER _IO('h', 0x7)
#define MAX_HPET_TBS 8 /* maximum hpet timer blocks */