WATCHDOG: octeon-wdt: Use I/O clock rate for timing calculations.

The creation of the I/O clock domain requires some adjustments.  Since
the watchdog counters are clocked by the I/O clock, use its rate for
timing calculations.
Signed-off-by: David Daney <ddaney@caviumnetworks.com>
Cc: Wim Van Sebroeck <wim@iguana.be>
Cc: linux-watchdog@vger.kernel.org
Patchwork: http://patchwork.linux-mips.org/patch/1659/Acked-by: Wim Van Sebroeck <wim@iguana.be>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

drivers/watchdog/octeon-wdt-main.c

@@ -478,7 +478,7 @@ static void octeon_wdt_calc_parameters(int t)
 
 	countdown_reset = periods > 2 ? periods - 2 : 0;
 	heartbeat = t;
-	timeout_cnt = ((octeon_get_clock_rate() >> 8) * timeout_sec) >> 8;
+	timeout_cnt = ((octeon_get_io_clock_rate() >> 8) * timeout_sec) >> 8;
 }
 
 static int octeon_wdt_set_heartbeat(int t)
@@ -677,7 +677,7 @@ static int __init octeon_wdt_init(void)
 	max_timeout_sec = 6;
 	do {
 		max_timeout_sec--;
-		timeout_cnt = ((octeon_get_clock_rate() >> 8) * max_timeout_sec) >> 8;
+		timeout_cnt = ((octeon_get_io_clock_rate() >> 8) * max_timeout_sec) >> 8;
 	} while (timeout_cnt > 65535);
 
 	BUG_ON(timeout_cnt == 0);