1 // SPDX-License-Identifier: GPL-2.0-or-later
62  * wdrtas_set_interval - sets the watchdog interval
63  * @interval: new interval
67  * wdrtas_set_interval sets the watchdog keepalive interval by calling the
68  * RTAS function set-indicator (surveillance). The unit of interval is
72 static int wdrtas_set_interval(int interval)  in wdrtas_set_interval()  argument
78 	interval = (interval + 59) / 60;  in wdrtas_set_interval()
81 			   WDRTAS_SURVEILLANCE_IND, 0, interval);  in wdrtas_set_interval()
84 		       interval, result);  in wdrtas_set_interval()
85 		print_msg--;  in wdrtas_set_interval()
94  * wdrtas_get_interval - returns the current watchdog interval
97  * returns the interval
99  * wdrtas_get_interval returns the current watchdog keepalive interval
100  * as reported by the RTAS function ibm,get-system-parameter. The unit
128  * wdrtas_timer_start - starts watchdog
131  * set-interval (surveillance)
139  * wdrtas_timer_stop - stops watchdog
142  * set-interval (surveillance)
150  * wdrtas_timer_keepalive - resets watchdog timer to keep system alive
153  * RTAS function event-scan and repeats these calls as long as there are
166 			pr_err("event-scan failed: %li\n", result);  in wdrtas_timer_keepalive()
175  * wdrtas_get_temperature - returns current temperature
180  * uses the RTAS call get-sensor-state, token 3 to do so
198  * wdrtas_get_status - returns the status of the watchdog
209  * wdrtas_get_boot_status - returns the reason for the last boot
221 /* wdrtas_write - called when watchdog device is written to
248 				return -EFAULT;  in wdrtas_write()
262  * wdrtas_ioctl - ioctl function for the watchdog device
286 			return -EFAULT;  in wdrtas_ioctl()
299 			return -EOPNOTSUPP;  in wdrtas_ioctl()
306 			return -EFAULT;  in wdrtas_ioctl()
324 			return -EFAULT;  in wdrtas_ioctl()
327 			return -EINVAL;  in wdrtas_ioctl()
341 		return -ENOTTY;  in wdrtas_ioctl()
346  * wdrtas_open - open function of watchdog device
350  * returns 0 on success, -EBUSY if the file has been opened already, <0 on
360 		return -EBUSY;  in wdrtas_open()
370  * wdrtas_close - close function of watchdog device
394  * wdrtas_temp_read - gives back the temperature in fahrenheit
400  * returns always 1 or -EFAULT in case of user space copy failures, <0 on
416 		return -EFAULT;  in wdrtas_temp_read()
422  * wdrtas_temp_open - open function of temperature device
436  * wdrtas_temp_close - close function of temperature device
450  * wdrtas_reboot - reboot notifier function
503  * wdrtas_get_tokens - reads in RTAS tokens
508  * this watchdog driver. It tolerates, if "get-sensor-state" and
509  * "ibm,get-system-parameter" are not available.
513 	wdrtas_token_get_sensor_state = rtas_token("get-sensor-state");  in wdrtas_get_tokens()
515 …pr_warn("couldn't get token for get-sensor-state. Trying to continue without temperature support.\…  in wdrtas_get_tokens()
518 	wdrtas_token_get_sp = rtas_token("ibm,get-system-parameter");  in wdrtas_get_tokens()
520 …pr_warn("couldn't get token for ibm,get-system-parameter. Trying to continue with a default timeou…  in wdrtas_get_tokens()
524 	wdrtas_token_set_indicator = rtas_token("set-indicator");  in wdrtas_get_tokens()
526 		pr_err("couldn't get token for set-indicator. Terminating watchdog code.\n");  in wdrtas_get_tokens()
527 		return -EIO;  in wdrtas_get_tokens()
530 	wdrtas_token_event_scan = rtas_token("event-scan");  in wdrtas_get_tokens()
532 		pr_err("couldn't get token for event-scan. Terminating watchdog code.\n");  in wdrtas_get_tokens()
533 		return -EIO;  in wdrtas_get_tokens()
540  * wdrtas_unregister_devs - unregisters the misc dev handlers
553  * wdrtas_register_devs - registers the misc dev handlers
582  * wdrtas_init - init function of the watchdog driver
591 		return -ENODEV;  in wdrtas_init()
594 		return -ENODEV;  in wdrtas_init()
599 		return -ENODEV;  in wdrtas_init()
611  * wdrtas_exit - exit function of the watchdog driver