--- zzzz-none-000/linux-3.10.107/drivers/watchdog/booke_wdt.c	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/drivers/watchdog/booke_wdt.c	2021-02-04 17:41:59.000000000 +0000
@@ -30,8 +30,6 @@
  * occur, and the final time the board will reset.
  */
 
-u32 booke_wdt_enabled;
-u32 booke_wdt_period = CONFIG_BOOKE_WDT_DEFAULT_TIMEOUT;
 
 #ifdef	CONFIG_PPC_FSL_BOOK3E
 #define WDTP(x)		((((x)&0x3)<<30)|(((x)&0x3c)<<15))
@@ -41,6 +39,11 @@
 #define WDTP_MASK	(TCR_WP_MASK)
 #endif
 
+static bool booke_wdt_enabled;
+module_param(booke_wdt_enabled, bool, 0);
+static int  booke_wdt_period = CONFIG_BOOKE_WDT_DEFAULT_TIMEOUT;
+module_param(booke_wdt_period, int, 0);
+
 #ifdef CONFIG_PPC_FSL_BOOK3E
 
 /* For the specified period, determine the number of seconds
@@ -103,17 +106,18 @@
 static void __booke_wdt_set(void *data)
 {
 	u32 val;
+	struct watchdog_device *wdog = data;
 
 	val = mfspr(SPRN_TCR);
 	val &= ~WDTP_MASK;
-	val |= WDTP(booke_wdt_period);
+	val |= WDTP(sec_to_period(wdog->timeout));
 
 	mtspr(SPRN_TCR, val);
 }
 
-static void booke_wdt_set(void)
+static void booke_wdt_set(void *data)
 {
-	on_each_cpu(__booke_wdt_set, NULL, 0);
+	on_each_cpu(__booke_wdt_set, data, 0);
 }
 
 static void __booke_wdt_ping(void *data)
@@ -131,12 +135,13 @@
 static void __booke_wdt_enable(void *data)
 {
 	u32 val;
+	struct watchdog_device *wdog = data;
 
 	/* clear status before enabling watchdog */
 	__booke_wdt_ping(NULL);
 	val = mfspr(SPRN_TCR);
 	val &= ~WDTP_MASK;
-	val |= (TCR_WIE|TCR_WRC(WRC_CHIP)|WDTP(booke_wdt_period));
+	val |= (TCR_WIE|TCR_WRC(WRC_CHIP)|WDTP(sec_to_period(wdog->timeout)));
 
 	mtspr(SPRN_TCR, val);
 }
@@ -162,25 +167,17 @@
 
 }
 
-static void __booke_wdt_start(struct watchdog_device *wdog)
+static int booke_wdt_start(struct watchdog_device *wdog)
 {
-	on_each_cpu(__booke_wdt_enable, NULL, 0);
+	on_each_cpu(__booke_wdt_enable, wdog, 0);
 	pr_debug("watchdog enabled (timeout = %u sec)\n", wdog->timeout);
-}
 
-static int booke_wdt_start(struct watchdog_device *wdog)
-{
-	if (booke_wdt_enabled == 0) {
-		booke_wdt_enabled = 1;
-		__booke_wdt_start(wdog);
-	}
 	return 0;
 }
 
 static int booke_wdt_stop(struct watchdog_device *wdog)
 {
 	on_each_cpu(__booke_wdt_disable, NULL, 0);
-	booke_wdt_enabled = 0;
 	pr_debug("watchdog disabled\n");
 
 	return 0;
@@ -189,11 +186,8 @@
 static int booke_wdt_set_timeout(struct watchdog_device *wdt_dev,
 				 unsigned int timeout)
 {
-	if (timeout > MAX_WDT_TIMEOUT)
-		return -EINVAL;
-	booke_wdt_period = sec_to_period(timeout);
 	wdt_dev->timeout = timeout;
-	booke_wdt_set();
+	booke_wdt_set(wdt_dev);
 
 	return 0;
 }
@@ -215,7 +209,6 @@
 	.info = &booke_wdt_info,
 	.ops = &booke_wdt_ops,
 	.min_timeout = 1,
-	.max_timeout = 0xFFFF
 };
 
 static void __exit booke_wdt_exit(void)
@@ -231,10 +224,11 @@
 	pr_info("powerpc book-e watchdog driver loaded\n");
 	booke_wdt_info.firmware_version = cur_cpu_spec->pvr_value;
 	booke_wdt_set_timeout(&booke_wdt_dev,
-			      period_to_sec(CONFIG_BOOKE_WDT_DEFAULT_TIMEOUT));
+			      period_to_sec(booke_wdt_period));
 	watchdog_set_nowayout(&booke_wdt_dev, nowayout);
+	booke_wdt_dev.max_timeout = MAX_WDT_TIMEOUT;
 	if (booke_wdt_enabled)
-		__booke_wdt_start(&booke_wdt_dev);
+		booke_wdt_start(&booke_wdt_dev);
 
 	ret = watchdog_register_device(&booke_wdt_dev);
 
@@ -244,5 +238,6 @@
 module_init(booke_wdt_init);
 module_exit(booke_wdt_exit);
 
+MODULE_ALIAS("booke_wdt");
 MODULE_DESCRIPTION("PowerPC Book-E watchdog driver");
 MODULE_LICENSE("GPL");