1 // SPDX-License-Identifier: GPL-2.0-only
5  *				- AF82MP20 PCH
7  *      Copyright (C) 2009-2010 Intel Corporation. All rights reserved.
35 #include <asm/intel-mid.h>
50 		"The range is from 1 to 160"
58 		"The range is from 1 to 170"
62  * force_boot == 0, then force boot on next watchdog interrupt after close,
99 	    (new_margin > MAX_TIME - timer_set)) {  in check_timer_margin()
100 		pr_debug("value of new_margin %d is out of the range %d to %d\n",  in check_timer_margin()
101 			 new_margin, MIN_TIME_CYCLE, MAX_TIME - timer_set);  in check_timer_margin()
102 		return -EINVAL;  in check_timer_margin()
171 	/* read eoi register - clears interrupt */  in intel_scu_keepalive()
202 		timer_margin * watchdog_device.timer_tbl_ptr->freq_hz;  in intel_scu_set_heartbeat()
204 		(watchdog_device.timer_set - timer_margin)  in intel_scu_set_heartbeat()
205 		* watchdog_device.timer_tbl_ptr->freq_hz;  in intel_scu_set_heartbeat()
208 		 watchdog_device.timer_tbl_ptr->freq_hz);  in intel_scu_set_heartbeat()
251 			return -ENODEV;  in intel_scu_set_heartbeat()
285 		return -EBUSY;  in intel_scu_open()
289 		return -EPERM;  in intel_scu_open()
307 		return -ENOTTY;  in intel_scu_release()
311 		/* Just close, since timer has not been started */  in intel_scu_release()
316 	pr_crit("Unexpected close of /dev/watchdog!\n");  in intel_scu_release()
368 				    sizeof(ident)) ? -EFAULT : 0;  in intel_scu_ioctl()
378 			return -EFAULT;  in intel_scu_ioctl()
381 			return -EINVAL;  in intel_scu_ioctl()
384 			return -EINVAL;  in intel_scu_ioctl()
390 		return -ENOTTY;  in intel_scu_ioctl()
432 		return -ENODEV;  in intel_scu_watchdog_init()
435 	/* are in range. */  in intel_scu_watchdog_init()
438 	    (timer_set > MAX_TIME - MIN_TIME_CYCLE)) {  in intel_scu_watchdog_init()
439 		pr_err("value of timer_set %x (hex) is out of range from %x to %x (hex)\n",  in intel_scu_watchdog_init()
440 		       timer_set, MIN_TIME_CYCLE, MAX_TIME - MIN_TIME_CYCLE);  in intel_scu_watchdog_init()
441 		return -EINVAL;  in intel_scu_watchdog_init()
446 		return -EINVAL;  in intel_scu_watchdog_init()
448 	watchdog_device.timer_tbl_ptr = sfi_get_mtmr(sfi_mtimer_num-1);  in intel_scu_watchdog_init()
452 		return -ENODEV;  in intel_scu_watchdog_init()
455 	if (watchdog_device.timer_tbl_ptr->phys_addr == 0) {  in intel_scu_watchdog_init()
458 		return -ENODEV;  in intel_scu_watchdog_init()
461 	if (watchdog_device.timer_tbl_ptr->irq == 0) {  in intel_scu_watchdog_init()
463 		return -ENODEV;  in intel_scu_watchdog_init()
466 	tmp_addr = ioremap(watchdog_device.timer_tbl_ptr->phys_addr,  in intel_scu_watchdog_init()
471 		return -ENOMEM;  in intel_scu_watchdog_init()
484 		timer_margin * watchdog_device.timer_tbl_ptr->freq_hz;  in intel_scu_watchdog_init()
486 		(watchdog_device.timer_set - timer_margin)  in intel_scu_watchdog_init()
487 		* watchdog_device.timer_tbl_ptr->freq_hz;  in intel_scu_watchdog_init()
510 	ret = request_irq((unsigned int)watchdog_device.timer_tbl_ptr->irq,  in intel_scu_watchdog_init()