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From: Stefan Riedmueller <s.riedmueller@phytec.de>
To: Wim Van Sebroeck <wim@linux-watchdog.org>,
	Guenter Roeck <linux@roeck-us.net>,
	Support Opensource <support.opensource@diasemi.com>
Cc: linux-watchdog@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH 3/3] watchdog: da9062: No need to ping manually before setting timeout
Date: Thu, 26 Mar 2020 16:02:03 +0100
Message-ID: <20200326150203.371673-3-s.riedmueller@phytec.de> (raw)
In-Reply-To: <20200326150203.371673-1-s.riedmueller@phytec.de>

There is actually no need to ping the watchdog before disabling it
during timeout change. Disabling the watchdog already takes care of
resetting the counter.

This fixes an issue during boot when the userspace watchdog handler takes
over and the watchdog is already running. Opening the watchdog in this case
leads to the first ping and directly after that without the required
heartbeat delay a second ping issued by the set_timeout call. Due to the
missing delay this resulted in a reset.

Signed-off-by: Stefan Riedmueller <s.riedmueller@phytec.de>
---
 drivers/watchdog/da9062_wdt.c | 5 -----
 1 file changed, 5 deletions(-)

diff --git a/drivers/watchdog/da9062_wdt.c b/drivers/watchdog/da9062_wdt.c
index 6d81b1276b87..c5bd075c8b14 100644
--- a/drivers/watchdog/da9062_wdt.c
+++ b/drivers/watchdog/da9062_wdt.c
@@ -66,11 +66,6 @@ static int da9062_wdt_update_timeout_register(struct da9062_watchdog *wdt,
 					      unsigned int regval)
 {
 	struct da9062 *chip = wdt->hw;
-	int ret;
-
-	ret = da9062_reset_watchdog_timer(wdt);
-	if (ret)
-		return ret;
 
 	regmap_update_bits(chip->regmap,
 				  DA9062AA_CONTROL_D,
-- 
2.23.0


  parent reply index

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-03-26 15:02 [PATCH 1/3] watchdog: da9062: Use pre-configured timeout until userspace takes over Stefan Riedmueller
2020-03-26 15:02 ` [PATCH 2/3] watchdog: da9063: Use pre configured timeout when watchdog is running Stefan Riedmueller
2020-03-30 16:38   ` Adam Thomson
2020-03-31 16:08     ` Guenter Roeck
2020-04-01  8:19       ` Stefan Riedmüller
2020-03-26 15:02 ` Stefan Riedmueller [this message]
2020-03-31 16:11   ` [PATCH 3/3] watchdog: da9062: No need to ping manually before setting timeout Guenter Roeck
2020-04-01 10:20   ` Adam Thomson
2020-03-31 16:00 ` [PATCH 1/3] watchdog: da9062: Use pre-configured timeout until userspace takes over Guenter Roeck
2020-03-31 16:04 ` Guenter Roeck

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