On 24/01/20 10:14 AM, Marek Vasut wrote:
The watchdog timer value was never updated in the hardware by this driver, so the watchdog triggered on some random stale value that was left in the hardware. The TI SPRUH37C says, quote:
20.4.3.9 Modifying Timer Count/Load Values and Prescaler Setting ... After a write access, the load register value and prescaler ratio registers are updated immediately, but new values are considered only after the next consecutive counter overflow or after a new trigger command (the WDT_WTGR register).
This means at least one trigger must happen. The driver probably depended on someone calling it's .reset() callback, however that is not guaranteed e.g. if the WDT operates without servicing.
Add this missing trigger.
Signed-off-by: Marek Vasut marex@denx.de Cc: Grygorii Strashko grygorii.strashko@ti.com Cc: Sam Protsenko semen.protsenko@linaro.org Cc: Suniel Mahesh sunil.m@techveda.org
Reviewed-by: Lokesh Vutla lokeshvutla@ti.com
Thanks and regards, Lokesh