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watchdog: it87_wdt: Add support for IT8721F watchdog 

This patch adds support for a watchdog in IT8721F Super IO
chip to it87_wdt driver.
This new chips differ from the older IT87xxxF chips 
in the following ways:

* WDT_GAMEPORT is not in IT8721F.
* WDT_PWROK is not in IT8721F.

Signed-off-by: Haruo Tomita <haruo.tomita@toshiba.co.jp>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
This commit is contained in:
Huaro Tomita 2011-01-21 07:37:51 +09:00 коммит произвёл Wim Van Sebroeck
Родитель a4616153de
Коммит 4bc30272a1
2 изменённых файлов: 12 добавлений и 8 удалений
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2
drivers/watchdog/Kconfig
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@ -580,7 +580,7 @@ config IT87_WDT
depends on X86 && EXPERIMENTAL
---help---
This is the driver for the hardware watchdog on the ITE IT8702,
IT8712, IT8716, IT8718, IT8720, IT8726, IT8712 Super I/O chips.
IT8712, IT8716, IT8718, IT8720, IT8721, IT8726 Super I/O chips.
This watchdog simply watches your kernel to make sure it doesn't
freeze, and if it does, it reboots your computer after a certain
amount of time.

18
drivers/watchdog/it87_wdt.c
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@ -12,7 +12,7 @@
* http://www.ite.com.tw/
*
* Support of the watchdog timers, which are available on
* IT8702, IT8712, IT8716, IT8718, IT8720 and IT8726.
* IT8702, IT8712, IT8716, IT8718, IT8720, IT8721 and IT8726.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
@ -45,7 +45,7 @@
#include <asm/system.h>
#define WATCHDOG_VERSION "1.13"
#define WATCHDOG_VERSION "1.14"
#define WATCHDOG_NAME "IT87 WDT"
#define PFX WATCHDOG_NAME ": "
#define DRIVER_VERSION WATCHDOG_NAME " driver, v" WATCHDOG_VERSION "\n"
@ -82,6 +82,7 @@
#define IT8716_ID 0x8716
#define IT8718_ID 0x8718
#define IT8720_ID 0x8720
#define IT8721_ID 0x8721
#define IT8726_ID 0x8726 /* the data sheet suggest wrongly 0x8716 */
/* GPIO Configuration Registers LDN=0x07 */
@ -94,7 +95,7 @@
#define WDT_CIRINT 0x80
#define WDT_MOUSEINT 0x40
#define WDT_KYBINT 0x20
#define WDT_GAMEPORT 0x10 /* not in it8718, it8720 */
#define WDT_GAMEPORT 0x10 /* not in it8718, it8720, it8721 */
#define WDT_FORCE 0x02
#define WDT_ZERO 0x01
@ -102,7 +103,7 @@
#define WDT_TOV1 0x80
#define WDT_KRST 0x40
#define WDT_TOVE 0x20
#define WDT_PWROK 0x10
#define WDT_PWROK 0x10 /* not in it8721 */
#define WDT_INT_MASK 0x0f
/* CIR Configuration Register LDN=0x0a */
@ -134,7 +135,7 @@
#define WDTS_USE_GP 4
#define WDTS_EXPECTED 5
static unsigned int base, gpact, ciract, max_units;
static unsigned int base, gpact, ciract, max_units, chip_type;
static unsigned long wdt_status;
static DEFINE_SPINLOCK(spinlock);
@ -215,7 +216,7 @@ static inline void superio_outw(int val, int reg)
/* Internal function, should be called after superio_select(GPIO) */
static void wdt_update_timeout(void)
{
unsigned char cfg = WDT_KRST | WDT_PWROK;
unsigned char cfg = WDT_KRST;
int tm = timeout;
if (testmode)
@ -226,6 +227,9 @@ static void wdt_update_timeout(void)
else
tm /= 60;
if (chip_type != IT8721_ID)
cfg |= WDT_PWROK;
superio_outb(cfg, WDTCFG);
superio_outb(tm, WDTVALLSB);
if (max_units > 255)
@ -555,7 +559,6 @@ static int __init it87_wdt_init(void)
{
int rc = 0;
int try_gameport = !nogameport;
u16 chip_type;
u8 chip_rev;
unsigned long flags;
@ -581,6 +584,7 @@ static int __init it87_wdt_init(void)
break;
case IT8718_ID:
case IT8720_ID:
case IT8721_ID:
max_units = 65535;
try_gameport = 0;
break;