1 // SPDX-License-Identifier: GPL-2.0-or-later
4  *	   for ITE IT87xx Environment Control - Low Pin Count Input / Output
12  *	Data-sheets: Publicly available at the ITE website
24 #include <linux/io.h>
38 /* IO Ports */
39 #define REG		0x2e  macro
108 	 * Try to reserve REG and REG + 1 for exclusive access.  in superio_enter()
110 	if (!request_muxed_region(REG, 2, WATCHDOG_NAME))  in superio_enter()
111 		return -EBUSY;  in superio_enter()
113 	outb(0x87, REG);  in superio_enter()
114 	outb(0x01, REG);  in superio_enter()
115 	outb(0x55, REG);  in superio_enter()
116 	outb(0x55, REG);  in superio_enter()
122 	outb(0x02, REG);  in superio_exit()
124 	release_region(REG, 2);  in superio_exit()
129 	outb(LDNREG, REG);  in superio_select()
133 static inline int superio_inb(int reg)  in superio_inb()  argument
135 	outb(reg, REG);  in superio_inb()
139 static inline void superio_outb(int val, int reg)  in superio_outb()  argument
141 	outb(reg, REG);  in superio_outb()
145 static inline int superio_inw(int reg)  in superio_inw()  argument
148 	outb(reg++, REG);  in superio_inw()
150 	outb(reg, REG);  in superio_inw()
195 	t -= t % 60;  in wdt_round_time()
203 	return wdt_update_timeout(wdd->timeout);  in wdt_start()
212  *	wdt_set_timeout - set a new timeout value with watchdog ioctl
228 	wdd->timeout = t;  in wdt_set_timeout()
300 		return -ENODEV;  in it87_wdt_init()
303 		return -ENODEV;  in it87_wdt_init()
307 		return -ENODEV;  in it87_wdt_init()
353 MODULE_DESCRIPTION("Hardware Watchdog Device Driver for IT87xx EC-LPC I/O");