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Message-ID: <20230819084726.11037-1-othacehe@gnu.org>
Date: Sat, 19 Aug 2023 10:47:26 +0200
From: Mathieu Othacehe <othacehe@....org>
To: nicolas.ferre@...rochip.com, alexandre.belloni@...tlin.com,
claudiu.beznea@...on.dev, wim@...ux-watchdog.org,
linux@...ck-us.net
Cc: linux-arm-kernel@...ts.infradead.org,
linux-watchdog@...r.kernel.org, linux-kernel@...r.kernel.org,
Mathieu Othacehe <othacehe@....org>
Subject: [PATCH] watchdog: sama5d4: readout initial state
Readout the AT91_WDT_MR bit at probe so that it becomes possible to get the
pre-userspace handler working.
Signed-off-by: Mathieu Othacehe <othacehe@....org>
---
drivers/watchdog/sama5d4_wdt.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/drivers/watchdog/sama5d4_wdt.c b/drivers/watchdog/sama5d4_wdt.c
index aeee934ca51b..7d31bb6f6204 100644
--- a/drivers/watchdog/sama5d4_wdt.c
+++ b/drivers/watchdog/sama5d4_wdt.c
@@ -255,6 +255,7 @@ static int sama5d4_wdt_probe(struct platform_device *pdev)
struct sama5d4_wdt *wdt;
void __iomem *regs;
u32 irq = 0;
+ u32 reg;
int ret;
wdt = devm_kzalloc(dev, sizeof(*wdt), GFP_KERNEL);
@@ -305,6 +306,12 @@ static int sama5d4_wdt_probe(struct platform_device *pdev)
watchdog_init_timeout(wdd, wdt_timeout, dev);
+ reg = wdt_read(wdt, AT91_WDT_MR);
+ if (!(reg & AT91_WDT_WDDIS)) {
+ wdt->mr &= ~AT91_WDT_WDDIS;
+ set_bit(WDOG_HW_RUNNING, &wdd->status);
+ }
+
ret = sama5d4_wdt_init(wdt);
if (ret)
return ret;
--
2.41.0
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