patch against linuxppc_2_4_devel: ppc405_wdt.c needs to be fixed

[Matthias Fuchs <matthias.fuchs@esd-electronics.com>]

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Hi,

I noticed that the 405 watchdog driver's ioctl() for GETPERIOD and SETPERIOD
are not working correctly. The ioctls pass the watchdog timer period in microseconds.
The variable wdt_period stores the current period in seconds.

The attached patch fixes this behavior.

Matthias

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--- drivers/char/ppc405_wdt.c	Wed Jun  4 08:58:42 2003
+++ /usr/src/linuxppc_2_4_devel/drivers/char/ppc405_wdt.c	Tue Dec 24 06:00:15 2002
@@ -190,8 +190,7 @@
 			}
 		case WDIOC_GETPERIOD:
 			/* return watchdog period (units = microseconds) */
-			period = wdt_period * MICROSECBASE;
-
+			period = (wdt_period / HZ) * MICROSECBASE;
 			if (copy_to_user((unsigned long *)arg, &period,
 			    sizeof(period))) {
 				return -EFAULT;
@@ -234,7 +233,8 @@
 			if (period == 0)
 				period = MAXONEHOUR * MICROSECBASE;

-			wdt_period = period / MICROSECBASE;
+			heartbeat_count(0) = (period / TENMSBASE) +
+				(period % TENMSBASE ? 1 : 0);
 			ppc405wd_update_timer();

 			break;