dect
/
linux-2.6
Archived
13
0
Fork 0
Code Releases Activity

[WATCHDOG] add support for the w83627thf chipset. 

Added support for W83627THF, watchdog chip.

Signed-off-by: Vlad Drukker <vlad@storewiz.com>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
This commit is contained in:
Vlad Drukker 2007-03-25 17:34:39 +02:00 committed by Wim Van Sebroeck
parent e0f2e3a06b
commit 0e94f2ee0d
1 changed files with 18 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

23
drivers/char/watchdog/w83627hf_wdt.c
View File

@ -1,5 +1,8 @@
/*
* w83627hf WDT driver
* w83627hf/thf WDT driver
*
* (c) Copyright 2007 Vlad Drukker <vlad@storewiz.com>
* added support for W83627THF.
*
* (c) Copyright 2003 Pádraig Brady <P@draigBrady.com>
*
@ -39,7 +42,7 @@
#include <asm/uaccess.h>
#include <asm/system.h>
#define WATCHDOG_NAME "w83627hf WDT"
#define WATCHDOG_NAME "w83627hf/thf WDT"
#define PFX WATCHDOG_NAME ": "
#define WATCHDOG_TIMEOUT 60 /* 60 sec default timeout */
@ -50,7 +53,7 @@ static spinlock_t io_lock;
/* You must set this - there is no sane way to probe for this board. */
static int wdt_io = 0x2E;
module_param(wdt_io, int, 0);
MODULE_PARM_DESC(wdt_io, "w83627hf WDT io port (default 0x2E)");
MODULE_PARM_DESC(wdt_io, "w83627hf/thf WDT io port (default 0x2E)");
static int timeout = WATCHDOG_TIMEOUT; /* in seconds */
module_param(timeout, int, 0);
@ -71,9 +74,19 @@ MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" _
static void
w83627hf_select_wd_register(void)
{
unsigned char c;
outb_p(0x87, WDT_EFER); /* Enter extended function mode */
outb_p(0x87, WDT_EFER); /* Again according to manual */
outb(0x20, WDT_EFER); /* check chip version */
c = inb(WDT_EFDR);
if (c == 0x82) { /* W83627THF */
outb_p(0x2b, WDT_EFER); /* select GPIO3 */
c = ((inb_p(WDT_EFDR) & 0xf7) | 0x04); /* select WDT0 */
outb_p(0x2b, WDT_EFER);
outb_p(c, WDT_EFDR); /* set GPIO3 to WDT0 */
}
outb_p(0x07, WDT_EFER); /* point to logical device number reg */
outb_p(0x08, WDT_EFDR); /* select logical device 8 (GPIO2) */
outb_p(0x30, WDT_EFER); /* select CR30 */
@ -311,7 +324,7 @@ wdt_init(void)
spin_lock_init(&io_lock);
printk(KERN_INFO "WDT driver for the Winbond(TM) W83627HF Super I/O chip initialising.\n");
printk(KERN_INFO "WDT driver for the Winbond(TM) W83627HF/THF Super I/O chip initialising.\n");
if (wdt_set_heartbeat(timeout)) {
wdt_set_heartbeat(WATCHDOG_TIMEOUT);
@ -367,5 +380,5 @@ module_exit(wdt_exit);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Pádraig Brady <P@draigBrady.com>");
MODULE_DESCRIPTION("w83627hf WDT driver");
MODULE_DESCRIPTION("w83627hf/thf WDT driver");
MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);