drivers/watchdog/ebc-c384_wdt.c

1 // SPDX-License-Identifier: GPL-2.0
3  * Watchdog timer driver for the WinSystems EBC-C384
18 #define MODULE_NAME		"ebc-c384_wdt"
21  * The timeout value in minutes must fit in a single byte when sent to the
22  * watchdog timer; the maximum timeout possible is 15300 (255 * 60) seconds.
35 static unsigned timeout;  variable
36 module_param(timeout, uint, 0);
37 MODULE_PARM_DESC(timeout, "Watchdog timeout in seconds (default="
42 	unsigned t = wdev->timeout;  in ebc_c384_wdt_start()
44 	/* resolution is in minutes for timeouts greater than 255 seconds */  in ebc_c384_wdt_start()
62 	/* resolution is in minutes for timeouts greater than 255 seconds */  in ebc_c384_wdt_set_timeout()
65 		wdev->timeout = roundup(t, 60);  in ebc_c384_wdt_set_timeout()
67 		/* set watchdog timer for minutes */  in ebc_c384_wdt_set_timeout()
70 		wdev->timeout = t;  in ebc_c384_wdt_set_timeout()
95 		dev_err(dev, "Unable to lock port addresses (0x%X-0x%X)\n",  in ebc_c384_wdt_probe()
97 		return -EBUSY;  in ebc_c384_wdt_probe()
102 		return -ENOMEM;  in ebc_c384_wdt_probe()
104 	wdd->info = &ebc_c384_wdt_info;  in ebc_c384_wdt_probe()
105 	wdd->ops = &ebc_c384_wdt_ops;  in ebc_c384_wdt_probe()
106 	wdd->timeout = WATCHDOG_TIMEOUT;  in ebc_c384_wdt_probe()
107 	wdd->min_timeout = 1;  in ebc_c384_wdt_probe()
108 	wdd->max_timeout = WATCHDOG_MAX_TIMEOUT;  in ebc_c384_wdt_probe()
111 	watchdog_init_timeout(wdd, timeout, dev);  in ebc_c384_wdt_probe()
125 	if (!dmi_match(DMI_BOARD_NAME, "EBC-C384 SBC"))  in ebc_c384_wdt_init()
126 		return -ENODEV;  in ebc_c384_wdt_init()
140 MODULE_DESCRIPTION("WinSystems EBC-C384 watchdog timer driver");