watchdog: it87_wdt: Add support for IT8728F watchdog.

This works the same way IT8721F works, but it supports WDT_PWROK
(checked on the datasheet).

Signed-off-by: Diego Elio Pettenò <flameeyes@flameeyes.eu>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>

2 files changed, 11 insertions, 3 deletions

diff --git a/drivers/watchdog/Kconfig b/drivers/watchdog/Kconfig
index 0542314e1510..66e77ad5ad6f 100644
--- a/drivers/watchdog/Kconfig
+++ b/drivers/watchdog/Kconfig
@@ -596,7 +596,12 @@ config IT87_WDT
         depends on X86 && EXPERIMENTAL
         ---help---
           This is the driver for the hardware watchdog on the ITE IT8702,
-          IT8712, IT8716, IT8718, IT8720, IT8721, IT8726 Super I/O chips.
+          IT8712, IT8716, IT8718, IT8720, IT8721, IT8726 and IT8728
+          Super I/O chips.
+
+          If the driver does not work, then make sure that the game port in
+          the BIOS is enabled.
+
           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.
diff --git a/drivers/watchdog/it87_wdt.c b/drivers/watchdog/it87_wdt.c
index 8a741bcb5124..d3dcc6988b5f 100644
--- a/drivers/watchdog/it87_wdt.c
+++ b/drivers/watchdog/it87_wdt.c
@@ -12,7 +12,8 @@
  *                  http://www.ite.com.tw/
  *
  *      Support of the watchdog timers, which are available on
- *      IT8702, IT8712, IT8716, IT8718, IT8720, IT8721 and IT8726.
+ *      IT8702, IT8712, IT8716, IT8718, IT8720, IT8721, IT8726
+ *      and IT8728.
  *
  *      This program is free software; you can redistribute it and/or
  *      modify it under the terms of the GNU General Public License
@@ -84,6 +85,7 @@
 #define IT8720_ID       0x8720
 #define IT8721_ID       0x8721
 #define IT8726_ID       0x8726  /* the data sheet suggest wrongly 0x8716 */
+#define IT8728_ID       0x8728
 
 /* GPIO Configuration Registers LDN=0x07 */
 #define WDTCTRL         0x71
@@ -95,7 +97,7 @@
 #define WDT_CIRINT      0x80
 #define WDT_MOUSEINT    0x40
 #define WDT_KYBINT      0x20
-#define WDT_GAMEPORT    0x10 /* not in it8718, it8720, it8721 */
+#define WDT_GAMEPORT    0x10 /* not in it8718, it8720, it8721, it8728 */
 #define WDT_FORCE       0x02
 #define WDT_ZERO        0x01
 
@@ -616,6 +618,7 @@ static int __init it87_wdt_init(void)
         case IT8718_ID:
         case IT8720_ID:
         case IT8721_ID:
+        case IT8728_ID:
                 max_units = 65535;
                 try_gameport = 0;
                 break;