From a6f052e39c3832b5842c4f44d9b3a4295dacfc4a Mon Sep 17 00:00:00 2001
From: Raphael Assenat <raph@8d.com>
Date: Mon, 29 Jun 2009 13:56:52 -0400
Subject: [WATCHDOG] SA1100 watchdog maximum timeout

This patch replaces the hardcoded 255 seconds limit for a real limit based on
oscr_freq.

Also, the 'firmware_version' field is changed to '1' to allow the user
space application to easily detect that this driver supports a higher
maximum timeout.

Signed-off-by: Raphael Assenat <raph@8D.com>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>

diff --git a/drivers/watchdog/sa1100_wdt.c b/drivers/watchdog/sa1100_wdt.c
index ee1caae..0162454 100644
--- a/drivers/watchdog/sa1100_wdt.c
+++ b/drivers/watchdog/sa1100_wdt.c
@@ -38,7 +38,7 @@
 
 static unsigned long oscr_freq;
 static unsigned long sa1100wdt_users;
-static int pre_margin;
+static unsigned int pre_margin;
 static int boot_status;
 
 /*
@@ -84,6 +84,7 @@ static const struct watchdog_info ident = {
 	.options	= WDIOF_CARDRESET | WDIOF_SETTIMEOUT
 				| WDIOF_KEEPALIVEPING,
 	.identity	= "SA1100/PXA255 Watchdog",
+	.firmware_version	= 1,
 };
 
 static long sa1100dog_ioctl(struct file *file, unsigned int cmd,
@@ -118,7 +119,7 @@ static long sa1100dog_ioctl(struct file *file, unsigned int cmd,
 		if (ret)
 			break;
 
-		if (time <= 0 || time > 255) {
+		if (time <= 0 || (oscr_freq * (long long)time >= 0xffffffff)) {
 			ret = -EINVAL;
 			break;
 		}
-- 
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