watchdog: f71808e_wdt: add support for the F71889FG

Signed-off-by: Giel van Schijndel <me@mortis.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 5a5c024482fa..57b8a410697b 100644
--- a/drivers/watchdog/Kconfig
+++ b/drivers/watchdog/Kconfig
@@ -409,11 +409,11 @@ config ALIM7101_WDT
           Most people will say N.
 
 config F71808E_WDT
-        tristate "Fintek F71808E and F71882FG Watchdog"
+        tristate "Fintek F71808E, F71882FG and F71889FG Watchdog"
         depends on X86 && EXPERIMENTAL
         help
           This is the driver for the hardware watchdog on the Fintek
-          F71808E and F71882FG Super I/O controllers.
+          F71808E, F71882FG and F71889FG Super I/O controllers.
 
           You can compile this driver directly into the kernel, or use
           it as a module.  The module will be called f71808e_wdt.
diff --git a/drivers/watchdog/f71808e_wdt.c b/drivers/watchdog/f71808e_wdt.c
index 7e5c266cda48..65e579635dba 100644
--- a/drivers/watchdog/f71808e_wdt.c
+++ b/drivers/watchdog/f71808e_wdt.c
@@ -308,6 +308,12 @@ static int watchdog_start(void)
                 superio_set_bit(watchdog.sioaddr, 0x29, 1);
                 break;
 
+        case f71889fg:
+                /* set pin 40 to WDTRST# */
+                superio_outb(watchdog.sioaddr, 0x2b,
+                                superio_inb(watchdog.sioaddr, 0x2b) & 0xcf);
+                break;
+
         default:
                 /*
                  * 'default' label to shut up the compiler and catch
@@ -708,8 +714,10 @@ static int __init f71808e_find(int sioaddr)
         case SIO_F71882_ID:
                 watchdog.type = f71882fg;
                 break;
-        case SIO_F71862_ID:
         case SIO_F71889_ID:
+                watchdog.type = f71889fg;
+                break;
+        case SIO_F71862_ID:
                 /* These have a watchdog, though it isn't implemented (yet). */
                 err = -ENOSYS;
                 goto exit;