watchdog/imx_watchdog: do not set WCR_WDW
with WCR_WDW set, the watchdog won't trigger if we bootet linux and idle
around while the watchdog is not triggered. It seems the timer makes
progress very slowly if at all. I managed to remain 20minutes alive
while the timeout was set to 60secs. It reboots within 60secs if I start
a busyloop in userland (something like "while (1) { }").
While I don't see a reason why the WDT should not be running while the
CPU is in idle, I'm dropping this bit.
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Acked-by: Stefano Babic <sbabic@denx.de>
diff --git a/drivers/watchdog/imx_watchdog.c b/drivers/watchdog/imx_watchdog.c
index d5993b4..1d18d4b 100644
--- a/drivers/watchdog/imx_watchdog.c
+++ b/drivers/watchdog/imx_watchdog.c
@@ -20,7 +20,6 @@
#define WCR_WDE 0x04 /* WDOG enable */
#define WCR_WDT 0x08
#define WCR_SRS 0x10
-#define WCR_WDW 0x80
#define SET_WCR_WT(x) (x << 8)
#ifdef CONFIG_IMX_WATCHDOG
@@ -47,7 +46,7 @@
#endif
timeout = (CONFIG_WATCHDOG_TIMEOUT_MSECS / 500) - 1;
writew(WCR_WDZST | WCR_WDBG | WCR_WDE | WCR_WDT | WCR_SRS |
- WCR_WDW | SET_WCR_WT(timeout), &wdog->wcr);
+ SET_WCR_WT(timeout), &wdog->wcr);
hw_watchdog_reset();
}
#endif