watchdog: booke_wdt: clean up status messages

Improve the status messages that are displayed during some operations of the
PowerPC watchdog timer driver.  When the watchdog is enabled, the timeout is
displayed as a number of seconds, instead of an obscure "period".  The "period"
is the position of a bit in a 64-bit timer register.  The higher the value,
the quicker the watchdog timeout occurs.  Some people chose a high "period"
value for the timer and get confused as to why the board resets within a
few seconds.

Messages displayed during open and close are now debug messages, so that they
don't clutter the console by default.  Finally, printk() is replaced with the
pr_xxx() equivalent.
Signed-off-by: Timur Tabi <timur@freescale.com>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>

drivers/watchdog/booke_wdt.c

@@ -4,7 +4,7 @@
  * Author: Matthew McClintock
  * Maintainer: Kumar Gala <galak@kernel.crashing.org>
  *
- * Copyright 2005, 2008, 2010 Freescale Semiconductor Inc.
+ * Copyright 2005, 2008, 2010-2011 Freescale Semiconductor Inc.
  *
  * This program is free software; you can redistribute  it and/or modify it
  * under  the terms of  the GNU General  Public License as published by the
@@ -221,9 +221,8 @@ static int booke_wdt_open(struct inode *inode, struct file *file)
 	if (booke_wdt_enabled == 0) {
 		booke_wdt_enabled = 1;
 		on_each_cpu(__booke_wdt_enable, NULL, 0);
-		printk(KERN_INFO
-		      "PowerPC Book-E Watchdog Timer Enabled (wdt_period=%d)\n",
-				booke_wdt_period);
+		pr_debug("booke_wdt: watchdog enabled (timeout = %llu sec)\n",
+			period_to_sec(booke_wdt_period));
 	}
 	spin_unlock(&booke_wdt_lock);
 
@@ -240,6 +239,7 @@ static int booke_wdt_release(struct inode *inode, struct file *file)
 	 */
 	on_each_cpu(__booke_wdt_disable, NULL, 0);
 	booke_wdt_enabled = 0;
+	pr_debug("booke_wdt: watchdog disabled\n");
 #endif
 
 	clear_bit(0, &wdt_is_active);
@@ -271,21 +271,20 @@ static int __init booke_wdt_init(void)
 {
 	int ret = 0;
 
-	printk(KERN_INFO "PowerPC Book-E Watchdog Timer Loaded\n");
+	pr_info("booke_wdt: powerpc book-e watchdog driver loaded\n");
 	ident.firmware_version = cur_cpu_spec->pvr_value;
 
 	ret = misc_register(&booke_wdt_miscdev);
 	if (ret) {
-		printk(KERN_CRIT "Cannot register miscdev on minor=%d: %d\n",
+		pr_err("booke_wdt: cannot register device (minor=%u, ret=%i)\n",
 		       WATCHDOG_MINOR, ret);
 		return ret;
 	}
 
 	spin_lock(&booke_wdt_lock);
 	if (booke_wdt_enabled == 1) {
-		printk(KERN_INFO
-		      "PowerPC Book-E Watchdog Timer Enabled (wdt_period=%d)\n",
-				booke_wdt_period);
+		pr_info("booke_wdt: watchdog enabled (timeout = %llu sec)\n",
+			period_to_sec(booke_wdt_period));
 		on_each_cpu(__booke_wdt_enable, NULL, 0);
 	}
 	spin_unlock(&booke_wdt_lock);