linux-kernel - [PATCH v4 1/5] watchdog: f71808e_wdt: fix inaccurate report in WDIOC

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Message-Id: <7f2a07eaa7dbd7c3f8162a89d364c3eef45883ea.1626948810.git-series.a.fatoum@pengutronix.de>
Date:   Thu, 22 Jul 2021 12:14:40 +0200
From:   Ahmad Fatoum <a.fatoum@...gutronix.de>
To:     Wim Van Sebroeck <wim@...ux-watchdog.org>,
        Guenter Roeck <linux@...ck-us.net>,
        linux-watchdog@...r.kernel.org
Cc:     kernel@...gutronix.de, linux-kernel@...r.kernel.org,
        Ahmad Fatoum <a.fatoum@...gutronix.de>
Subject: [PATCH v4 1/5] watchdog: f71808e_wdt: fix inaccurate report in WDIOC_GETTIMEOUT

The fintek watchdog timer can configure timeouts of second granularity
only up to 255 seconds. Beyond that, the timeout needs to be configured
with minute granularity. WDIOC_GETTIMEOUT should report the actual
timeout configured, not just echo back the timeout configured by the
user. Do so.

Fixes: 96cb4eb019ce ("watchdog: f71808e_wdt: new watchdog driver for Fintek F71808E and F71882FG")
Suggested-by: Guenter Roeck <linux@...ck-us.net>
Signed-off-by: Ahmad Fatoum <a.fatoum@...gutronix.de>
---
 drivers/watchdog/f71808e_wdt.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/watchdog/f71808e_wdt.c b/drivers/watchdog/f71808e_wdt.c
index f60beec1bbae..f7d82d261913 100644
--- a/drivers/watchdog/f71808e_wdt.c
+++ b/drivers/watchdog/f71808e_wdt.c
@@ -228,15 +228,17 @@ static int watchdog_set_timeout(int timeout)
 
 	mutex_lock(&watchdog.lock);
 
-	watchdog.timeout = timeout;
 	if (timeout > 0xff) {
 		watchdog.timer_val = DIV_ROUND_UP(timeout, 60);
 		watchdog.minutes_mode = true;
+		timeout = watchdog.timer_val * 60;
 	} else {
 		watchdog.timer_val = timeout;
 		watchdog.minutes_mode = false;
 	}
 
+	watchdog.timeout = timeout;
+
 	mutex_unlock(&watchdog.lock);
 
 	return 0;
-- 
git-series 0.9.1