imx_watchdog: Do not assert WDOG_B on watchdog init

Currently the driver asserts WDOG_B by clearing WCR_WDA bit when
enabling the watchdog. Do not clear WCR_WDA.

Signed-off-by: Ross Parker <rossjparker@gmail.com>
Cc: Stefano Babic <sbabic@denx.de>

drivers/watchdog/imx_watchdog.c

@@ -34,7 +34,7 @@ void hw_watchdog_init(void)
 #endif
 	timeout = (CONFIG_WATCHDOG_TIMEOUT_MSECS / 500) - 1;
 	writew(WCR_WDZST | WCR_WDBG | WCR_WDE | WCR_WDT | WCR_SRS |
-		SET_WCR_WT(timeout), &wdog->wcr);
+		WCR_WDA | SET_WCR_WT(timeout), &wdog->wcr);
 	hw_watchdog_reset();
 }
 #endif

include/fsl_wdog.h

@@ -15,5 +15,6 @@ struct watchdog_regs {
 #define WCR_WDE		0x04
 #define WCR_WDT		0x08
 #define WCR_SRS		0x10
+#define WCR_WDA 	0x20
 #define SET_WCR_WT(x)	(x << 8)
 #define WCR_WT_MSK	SET_WCR_WT(0xFF)