linux-kernel - [PATCH v2] watchdog: pnx4008: readout watchdog state

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Date:   Thu, 11 Apr 2019 21:14:37 +0200
From:   Alexandre Belloni <alexandre.belloni@...tlin.com>
To:     Guenter Roeck <linux@...ck-us.net>,
        Vladimir Zapolskiy <vz@...ia.com>
Cc:     Wim Van Sebroeck <wim@...ux-watchdog.org>,
        Sylvain Lemieux <slemieux.tyco@...il.com>,
        Gregory Clement <gregory.clement@...tlin.com>,
        linux-arm-kernel@...ts.infradead.org,
        linux-watchdog@...r.kernel.org, linux-kernel@...r.kernel.org,
        Alexandre Belloni <alexandre.belloni@...tlin.com>
Subject: [PATCH v2] watchdog: pnx4008: readout watchdog state

Readout the enabled state so it is possible to get the pre-userspace
handler working. Also, avoid disabling the watchdog to ensure it continues
working and triggers if there is an issue later in the boot or if userspace
fails to start.

Signed-off-by: Alexandre Belloni <alexandre.belloni@...tlin.com>
---
 drivers/watchdog/pnx4008_wdt.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/watchdog/pnx4008_wdt.c b/drivers/watchdog/pnx4008_wdt.c
index 8e261799c84e..4ce0389d1442 100644
--- a/drivers/watchdog/pnx4008_wdt.c
+++ b/drivers/watchdog/pnx4008_wdt.c
@@ -209,7 +209,8 @@ static int pnx4008_wdt_probe(struct platform_device *pdev)
 	watchdog_set_nowayout(&pnx4008_wdd, nowayout);
 	watchdog_set_restart_priority(&pnx4008_wdd, 128);
 
-	pnx4008_wdt_stop(&pnx4008_wdd);	/* disable for now */
+	if (readl(WDTIM_CTRL(wdt_base)) & COUNT_ENAB)
+		set_bit(WDOG_HW_RUNNING, &pnx4008_wdd.status);
 
 	ret = watchdog_register_device(&pnx4008_wdd);
 	if (ret < 0) {
-- 
2.20.1