arm64 does not have a grace period after calling reset handlers. It is rightfully assumed that watchdog drivers should wait because they know the time needed. Implement this for the Renesas watchdog driver. Signed-off-by: Wolfram Sang <wsa+renesas@xxxxxxxxxxxxxxxxxxxx> --- drivers/watchdog/renesas_wdt.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/watchdog/renesas_wdt.c b/drivers/watchdog/renesas_wdt.c index d2b5074bca65..5791198960e6 100644 --- a/drivers/watchdog/renesas_wdt.c +++ b/drivers/watchdog/renesas_wdt.c @@ -151,6 +151,9 @@ static int rwdt_restart(struct watchdog_device *wdev, unsigned long action, rwdt_write(priv, RWTCSRA_TME, RWTCSRA); + /* wait 2 cycles, so watchdog will trigger */ + udelay(DIV_ROUND_UP(2 * 1000000, priv->clk_rate)); + return 0; } -- 2.28.0
