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....@freescale.com>
Cc: Stefano Babic <sba...@denx.de>
Cc: Fabio Estevam <fabio.este...@freescale.com>
Cc: Sebastian Siewior <bige...@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
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