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path: root/drivers/watchdog/at91rm9200_wdt.c
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Diffstat (limited to 'drivers/watchdog/at91rm9200_wdt.c')
-rw-r--r--drivers/watchdog/at91rm9200_wdt.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/watchdog/at91rm9200_wdt.c b/drivers/watchdog/at91rm9200_wdt.c
index 993e5f52afe..e35d5458923 100644
--- a/drivers/watchdog/at91rm9200_wdt.c
+++ b/drivers/watchdog/at91rm9200_wdt.c
@@ -13,6 +13,7 @@
#include <linux/errno.h>
#include <linux/fs.h>
#include <linux/init.h>
+#include <linux/io.h>
#include <linux/kernel.h>
#include <linux/miscdevice.h>
#include <linux/module.h>
@@ -106,10 +107,10 @@ static int at91_wdt_close(struct inode *inode, struct file *file)
static int at91_wdt_settimeout(int new_time)
{
/*
- * All counting occurs at SLOW_CLOCK / 128 = 0.256 Hz
+ * All counting occurs at SLOW_CLOCK / 128 = 256 Hz
*
* Since WDV is a 16-bit counter, the maximum period is
- * 65536 / 0.256 = 256 seconds.
+ * 65536 / 256 = 256 seconds.
*/
if ((new_time <= 0) || (new_time > WDT_MAX_TIME))
return -EINVAL;