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| author | Sebastian Siewior <bigeasy@linutronix.de> | 2015-03-03 17:45:43 +0100 |
|---|---|---|
| committer | Stefano Babic <sbabic@denx.de> | 2015-03-25 16:52:16 +0100 |
| commit | 5cab874052614fb130cd9b16fc6a3d27cae0741e (patch) | |
| tree | 6a522b5a09486729f0139e7b65e9208ac8b5cd20 /drivers/watchdog | |
| parent | 27d3608076b37f372b9ba59e1eb00114291d6558 (diff) | |
| download | blackbird-obmc-uboot-5cab874052614fb130cd9b16fc6a3d27cae0741e.tar.gz blackbird-obmc-uboot-5cab874052614fb130cd9b16fc6a3d27cae0741e.zip | |
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>
Diffstat (limited to 'drivers/watchdog')
| -rw-r--r-- | drivers/watchdog/imx_watchdog.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/drivers/watchdog/imx_watchdog.c b/drivers/watchdog/imx_watchdog.c index d5993b4d26..1d18d4b269 100644 --- a/drivers/watchdog/imx_watchdog.c +++ b/drivers/watchdog/imx_watchdog.c @@ -20,7 +20,6 @@ struct watchdog_regs { #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 @@ void hw_watchdog_init(void) #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 |
