[U-Boot] [PATCH 2/3] imx: wdog: correct wcr register settings

[Peng Fan]

We should not simple use "writew(WCR_WDE, &wdog->wcr)" to set
wcr, since this will override bits set before reset_cpu.

Use clrsetbits_le32 instead of writew to fix this issue.

Signed-off-by: Peng Fan <Peng.Fan at freescale.com>
Cc: Stefano Babic <sbabic at denx.de>
Cc: Fabio Estevam <fabio.estevam at freescale.com>
Cc: Sebastian Siewior <bigeasy at linutronix.de>
---
 drivers/watchdog/imx_watchdog.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/watchdog/imx_watchdog.c b/drivers/watchdog/imx_watchdog.c
index 1d18d4b..9a77a54 100644
--- a/drivers/watchdog/imx_watchdog.c
+++ b/drivers/watchdog/imx_watchdog.c
@@ -55,7 +55,8 @@ void reset_cpu(ulong addr)
 {
 	struct watchdog_regs *wdog = (struct watchdog_regs *)WDOG1_BASE_ADDR;
 
-	writew(WCR_WDE, &wdog->wcr);
+	clrsetbits_le16(&wdog->wcr, 0, WCR_WDE);
+
 	writew(0x5555, &wdog->wsr);
 	writew(0xaaaa, &wdog->wsr);	/* load minimum 1/2 second timeout */
 	while (1) {
-- 
1.8.4