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watchdog: sama5d4: readout initial state

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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@gnu.org>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20230819084726.11037-1-othacehe@gnu.org
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>
This commit is contained in:
Mathieu Othacehe 2023-08-19 10:47:26 +02:00 committed by Wim Van Sebroeck
parent cf38e7691c
commit 266da53c35
1 changed files with 7 additions and 0 deletions
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7
drivers/watchdog/sama5d4_wdt.c
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@ -254,6 +254,7 @@ static int sama5d4_wdt_probe(struct platform_device *pdev)
struct sama5d4_wdt *wdt; struct sama5d4_wdt *wdt;
void __iomem *regs; void __iomem *regs;
u32 irq = 0; u32 irq = 0;
u32 reg;
int ret; int ret;
wdt = devm_kzalloc(dev, sizeof(*wdt), GFP_KERNEL); wdt = devm_kzalloc(dev, sizeof(*wdt), GFP_KERNEL);
@ -304,6 +305,12 @@ static int sama5d4_wdt_probe(struct platform_device *pdev)
watchdog_init_timeout(wdd, wdt_timeout, dev); 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); ret = sama5d4_wdt_init(wdt);
if (ret) if (ret)
return ret; return ret;