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watchdog: it87_wdt: Add support for IT8720F watchdog
This simple patch adds support for a watchdog in IT8720F Super IO chip to it87_wdt driver. Signed-off-by: Ondrej Zajicek <santiago@crfreenet.org> Signed-off-by: Wim Van Sebroeck <wim@iguana.be> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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2 changed files with 16 additions and 10 deletions
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@ -565,10 +565,11 @@ config IT87_WDT
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tristate "IT87 Watchdog Timer"
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depends on X86 && EXPERIMENTAL
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---help---
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This is the driver for the hardware watchdog on the ITE IT8716,
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IT8718, IT8726, IT8712(Version J,K) Super I/O chips. This watchdog
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simply watches your kernel to make sure it doesn't freeze, and if
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it does, it reboots your computer after a certain amount of time.
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This is the driver for the hardware watchdog on the ITE
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IT8716, IT8718, IT8720, IT8726, IT8712(Version J,K) Super I/O
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chips. This watchdog simply watches your kernel to make sure
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it doesn't freeze, and if it does, it reboots your computer
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after a certain amount of time.
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To compile this driver as a module, choose M here: the module will
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be called it87_wdt.
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@ -12,7 +12,7 @@
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* http://www.ite.com.tw/
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*
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* Support of the watchdog timers, which are available on
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* IT8716, IT8718, IT8726 and IT8712 (J,K version).
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* IT8716, IT8718, IT8720, IT8726 and IT8712 (J,K version).
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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@ -45,7 +45,7 @@
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#include <asm/system.h>
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#define WATCHDOG_VERSION "1.12"
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#define WATCHDOG_VERSION "1.13"
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#define WATCHDOG_NAME "IT87 WDT"
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#define PFX WATCHDOG_NAME ": "
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#define DRIVER_VERSION WATCHDOG_NAME " driver, v" WATCHDOG_VERSION "\n"
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@ -80,6 +80,7 @@
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#define IT8712_ID 0x8712
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#define IT8716_ID 0x8716
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#define IT8718_ID 0x8718
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#define IT8720_ID 0x8720
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#define IT8726_ID 0x8726 /* the data sheet suggest wrongly 0x8716 */
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/* GPIO Configuration Registers LDN=0x07 */
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@ -92,7 +93,7 @@
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#define WDT_CIRINT 0x80
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#define WDT_MOUSEINT 0x40
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#define WDT_KYBINT 0x20
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#define WDT_GAMEPORT 0x10 /* not it8718 */
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#define WDT_GAMEPORT 0x10 /* not in it8718, it8720 */
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#define WDT_FORCE 0x02
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#define WDT_ZERO 0x01
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@ -529,6 +530,7 @@ static struct notifier_block wdt_notifier = {
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static int __init it87_wdt_init(void)
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{
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int rc = 0;
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int try_gameport = !nogameport;
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u16 chip_type;
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u8 chip_rev;
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unsigned long flags;
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@ -542,9 +544,12 @@ static int __init it87_wdt_init(void)
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switch (chip_type) {
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case IT8716_ID:
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case IT8718_ID:
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case IT8726_ID:
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break;
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case IT8718_ID:
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case IT8720_ID:
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try_gameport = 0;
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break;
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case IT8712_ID:
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if (chip_rev > 7)
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break;
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@ -571,7 +576,7 @@ static int __init it87_wdt_init(void)
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superio_outb(0x00, WDTCTRL);
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/* First try to get Gameport support */
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if (chip_type != IT8718_ID && !nogameport) {
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if (try_gameport) {
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superio_select(GAMEPORT);
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base = superio_inw(BASEREG);
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if (!base) {
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@ -676,7 +681,7 @@ static int __init it87_wdt_init(void)
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spin_unlock_irqrestore(&spinlock, flags);
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}
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err_out:
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if (chip_type != IT8718_ID && !nogameport) {
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if (try_gameport) {
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spin_lock_irqsave(&spinlock, flags);
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superio_enter();
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superio_select(GAMEPORT);
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