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>
diff --git a/drivers/watchdog/Kconfig b/drivers/watchdog/Kconfig
index c356146..cc53136 100644
--- a/drivers/watchdog/Kconfig
+++ b/drivers/watchdog/Kconfig
@@ -565,10 +565,11 @@
tristate "IT87 Watchdog Timer"
depends on X86 && EXPERIMENTAL
---help---
- This is the driver for the hardware watchdog on the ITE IT8716,
- IT8718, IT8726, IT8712(Version J,K) 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.
+ This is the driver for the hardware watchdog on the ITE
+ IT8716, IT8718, IT8720, IT8726, IT8712(Version J,K) 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.
To compile this driver as a module, choose M here: the module will
be called it87_wdt.
diff --git a/drivers/watchdog/it87_wdt.c b/drivers/watchdog/it87_wdt.c
index b709b3b..455de77 100644
--- a/drivers/watchdog/it87_wdt.c
+++ b/drivers/watchdog/it87_wdt.c
@@ -12,7 +12,7 @@
* http://www.ite.com.tw/
*
* Support of the watchdog timers, which are available on
- * IT8716, IT8718, IT8726 and IT8712 (J,K version).
+ * IT8716, IT8718, IT8720, IT8726 and IT8712 (J,K version).
*
* 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 "1.12"
+#define WATCHDOG_VERSION "1.13"
#define WATCHDOG_NAME "IT87 WDT"
#define PFX WATCHDOG_NAME ": "
#define DRIVER_VERSION WATCHDOG_NAME " driver, v" WATCHDOG_VERSION "\n"
@@ -80,6 +80,7 @@
#define IT8712_ID 0x8712
#define IT8716_ID 0x8716
#define IT8718_ID 0x8718
+#define IT8720_ID 0x8720
#define IT8726_ID 0x8726 /* the data sheet suggest wrongly 0x8716 */
/* GPIO Configuration Registers LDN=0x07 */
@@ -92,7 +93,7 @@
#define WDT_CIRINT 0x80
#define WDT_MOUSEINT 0x40
#define WDT_KYBINT 0x20
-#define WDT_GAMEPORT 0x10 /* not it8718 */
+#define WDT_GAMEPORT 0x10 /* not in it8718, it8720 */
#define WDT_FORCE 0x02
#define WDT_ZERO 0x01
@@ -529,6 +530,7 @@
static int __init it87_wdt_init(void)
{
int rc = 0;
+ int try_gameport = !nogameport;
u16 chip_type;
u8 chip_rev;
unsigned long flags;
@@ -542,9 +544,12 @@
switch (chip_type) {
case IT8716_ID:
- case IT8718_ID:
case IT8726_ID:
break;
+ case IT8718_ID:
+ case IT8720_ID:
+ try_gameport = 0;
+ break;
case IT8712_ID:
if (chip_rev > 7)
break;
@@ -571,7 +576,7 @@
superio_outb(0x00, WDTCTRL);
/* First try to get Gameport support */
- if (chip_type != IT8718_ID && !nogameport) {
+ if (try_gameport) {
superio_select(GAMEPORT);
base = superio_inw(BASEREG);
if (!base) {
@@ -676,7 +681,7 @@
spin_unlock_irqrestore(&spinlock, flags);
}
err_out:
- if (chip_type != IT8718_ID && !nogameport) {
+ if (try_gameport) {
spin_lock_irqsave(&spinlock, flags);
superio_enter();
superio_select(GAMEPORT);