watchdog: w83627hf_wdt: Add support for NCT6791 and NCT6792

The watchdog functionality in both chips is almost identical to NCT6779.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>

drivers/watchdog/Kconfig

@@ -1015,6 +1015,8 @@ config W83627HF_WDT
 		NCT6775
 		NCT6776
 		NCT6779
+		NCT6791
+		NCT6792
 
 	  This watchdog simply watches your kernel to make sure it doesn't
 	  freeze, and if it does, it reboots your computer after a certain

drivers/watchdog/w83627hf_wdt.c

@@ -50,7 +50,7 @@ static int cr_wdt_control;	/* WDT control register */
 
 enum chips { w83627hf, w83627s, w83697hf, w83697ug, w83637hf, w83627thf,
 	     w83687thf, w83627ehf, w83627dhg, w83627uhg, w83667hg, w83627dhg_p,
-	     w83667hg_b, nct6775, nct6776, nct6779 };
+	     w83667hg_b, nct6775, nct6776, nct6779, nct6791, nct6792 };
 
 static int timeout;			/* in seconds */
 module_param(timeout, int, 0);
@@ -95,6 +95,8 @@ MODULE_PARM_DESC(early_disable, "Disable watchdog at boot time (default=0)");
 #define NCT6775_ID		0xb4
 #define NCT6776_ID		0xc3
 #define NCT6779_ID		0xc5
+#define NCT6791_ID		0xc8
+#define NCT6792_ID		0xc9
 
 #define W83627HF_WDT_TIMEOUT	0xf6
 #define W83697HF_WDT_TIMEOUT	0xf4
@@ -195,6 +197,8 @@ static int w83627hf_init(struct watchdog_device *wdog, enum chips chip)
 	case nct6775:
 	case nct6776:
 	case nct6779:
+	case nct6791:
+	case nct6792:
 		/*
 		 * These chips have a fixed WDTO# output pin (W83627UHG),
 		 * or support more than one WDTO# output pin.
@@ -395,6 +399,12 @@ static int wdt_find(int addr)
 	case NCT6779_ID:
 		ret = nct6779;
 		break;
+	case NCT6791_ID:
+		ret = nct6791;
+		break;
+	case NCT6792_ID:
+		ret = nct6792;
+		break;
 	case 0xff:
 		ret = -ENODEV;
 		break;
@@ -428,6 +438,8 @@ static int __init wdt_init(void)
 		"NCT6775",
 		"NCT6776",
 		"NCT6779",
+		"NCT6791",
+		"NCT6792",
 	};
 
 	wdt_io = 0x2e;