[ARM] 5390/1: AT91: Watchdog fixes

The recently merged AT91SAM9 watchdog driver uses the
AT91SAM9X_WATCHDOG config variable, whereas the original version of
the driver (and the platform support code) used AT91SAM9_WATCHDOG.
This causes the watchdog platform_device to never be registered, and
therefore the driver not to be initialized.

This patch:
- updates the platform support code to use AT91SAM9X_WATCHDOG.
- includes <linux/io.h> to fix compile error (same fix as was applied
to at91rm9200_wdt.c)
- fixes comment regarding watchdog clock-rates in at91rm9200.

Signed-off-by: Andrew Victor <linux@maxim.org.za>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 2 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;