2 files changed, 3 insertions, 2 deletions

diff --git a/drivers/watchdog/at91rm9200_wdt.c b/drivers/watchdog/at91rm9200_wdt.c
index 5531691f46ea..e35d54589232 100644
--- a/drivers/watchdog/at91rm9200_wdt.c
+++ b/drivers/watchdog/at91rm9200_wdt.c
@@ -107,10 +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;
diff --git a/drivers/watchdog/at91sam9_wdt.c b/drivers/watchdog/at91sam9_wdt.c
index b1da287f90ec..a56ac84381b1 100644
--- a/drivers/watchdog/at91sam9_wdt.c
+++ b/drivers/watchdog/at91sam9_wdt.c
@@ -18,6 +18,7 @@
 #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>