36 #include <linux/hpet.h>
44  * See HPET spec revision 1.
49 #define HPET_RANGE_SIZE		1024	/* from HPET spec */
67 /* A lock for concurrent access by app and isr hpet activity. */
74 	struct hpet __iomem *hd_hpet;
88 	struct hpet __iomem *hp_hpet;
125 		struct hpet __iomem *hpet = devp->hd_hpet;  in hpet_interrupt()  local
130 		mc = read_counter(&hpet->hpet_mc);  in hpet_interrupt()
139 		 * where t is the interval in hpet ticks for the given freq,  in hpet_interrupt()
352 	pr_info("HPET mmap %s\n", hpet_mmap_enabled ? "enabled" : "disabled");  in hpet_mmap_enable()
434 	struct hpet __iomem *hpet;  in hpet_ioctl_ieon()  local
441 	hpet = devp->hd_hpet;  in hpet_ioctl_ieon()
473 			write_counter(read_counter(&hpet->hpet_mc),  in hpet_ioctl_ieon()
477 			writel(isr, &hpet->hpet_isr);  in hpet_ioctl_ieon()
480 		sprintf(devp->hd_name, "hpet%d", (int)(devp - hpetp->hp_dev));  in hpet_ioctl_ieon()
484 			printk(KERN_ERR "hpet: IRQ %d is not free\n", irq);  in hpet_ioctl_ieon()
518 		m = read_counter(&hpet->hpet_mc);  in hpet_ioctl_ieon()
527 		m = read_counter(&hpet->hpet_mc);  in hpet_ioctl_ieon()
533 		writel(isr, &hpet->hpet_isr);  in hpet_ioctl_ieon()
752 	struct hpet __iomem *hpet;  in __hpet_calibrate()  local
763 	hpet = hpetp->hp_hpet;  in __hpet_calibrate()
771 	start = read_counter(&hpet->hpet_mc);  in __hpet_calibrate()
774 		m = read_counter(&hpet->hpet_mc);  in __hpet_calibrate()
809 	struct hpet __iomem *hpet;  in hpet_alloc()  local
817 	 * If platform dependent code has allocated the hpet that  in hpet_alloc()
821 		printk(KERN_DEBUG "%s: duplicate HPET ignored\n",  in hpet_alloc()
841 	hpet = hpetp->hp_hpet;  in hpet_alloc()
843 	cap = readq(&hpet->hpet_cap);  in hpet_alloc()
848 		printk(KERN_WARNING "hpet: number irqs doesn't agree"  in hpet_alloc()
868 	printk(KERN_INFO "hpet%u: at MMIO 0x%lx, IRQ%s",  in hpet_alloc()
878 		"hpet%u: %u comparators, %d-bit %u.%06u MHz counter\n",  in hpet_alloc()
883 	mcfg = readq(&hpet->hpet_config);  in hpet_alloc()
885 		write_counter(0L, &hpet->hpet_mc);  in hpet_alloc()
887 		writeq(mcfg, &hpet->hpet_config);  in hpet_alloc()
893 		timer = &hpet->hpet_timers[devp - hpetp->hp_dev];  in hpet_alloc()
896 		devp->hd_hpet = hpet;  in hpet_alloc()
1005 	.name = "hpet",
1012 static struct miscdevice hpet_misc = { HPET_MINOR, "hpet", &hpet_fops };
1022 	sysctl_header = register_sysctl("dev/hpet", hpet_table);  in hpet_init()