[PATCH 1/4] watchdog: dw_wdt: Write counter restart register

[Sascha Hauer]

At least some variants of the dwc watchdog controllers need the
value 0x76 written to the counter restart register to actually
take the value written to the Timeout range register. Happened
on Rockchip RK3568, without this the watchdog immediately resets
the system.

Signed-off-by: Sascha Hauer <s.hauer at pengutronix.de>
---
 drivers/watchdog/dw_wdt.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/watchdog/dw_wdt.c b/drivers/watchdog/dw_wdt.c
index 17771c7126..bc5d4a889a 100644
--- a/drivers/watchdog/dw_wdt.c
+++ b/drivers/watchdog/dw_wdt.c
@@ -111,6 +111,9 @@ static int dw_wdt_set_timeout(struct watchdog *wdd, unsigned int top_s)
 	writel(top_val | top_val << WDOG_TIMEOUT_RANGE_TOPINIT_SHIFT,
 	       dw_wdt->regs + WDOG_TIMEOUT_RANGE_REG_OFFSET);
 
+	writel(WDOG_COUNTER_RESTART_KICK_VALUE,
+	       dw_wdt->regs + WDOG_COUNTER_RESTART_REG_OFFSET);
+
 	dw_wdt_start(wdd);
 
 	return 0;
-- 
2.29.2