Re: [PATCH] watchdog: msc313e: Check if the WDT was running at boot
From: Guenter Roeck <linux@roeck-us.net>
Date: 2021-12-28 16:06:18
Also in:
linux-watchdog, lkml
On 12/27/21 11:34 PM, Daniel Palmer wrote:
Check if the WDT was running at boot and set the running flag if it was. This prevents the system from getting rebooted if the userland daemon doesn't take over soon enough or there isn't a userland daemon at all. Signed-off-by: Daniel Palmer <redacted>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
quoted hunk ↗ jump to hunk
--- drivers/watchdog/msc313e_wdt.c | 4 ++++ 1 file changed, 4 insertions(+)diff --git a/drivers/watchdog/msc313e_wdt.c b/drivers/watchdog/msc313e_wdt.c index 0d497aa0fb7d..90171431fc59 100644 --- a/drivers/watchdog/msc313e_wdt.c +++ b/drivers/watchdog/msc313e_wdt.c@@ -120,6 +120,10 @@ static int msc313e_wdt_probe(struct platform_device *pdev) priv->wdev.max_timeout = U32_MAX / clk_get_rate(priv->clk); priv->wdev.timeout = MSC313E_WDT_DEFAULT_TIMEOUT; + /* If the period is non-zero the WDT is running */ + if (readw(priv->base + REG_WDT_MAX_PRD_L) | (readw(priv->base + REG_WDT_MAX_PRD_H) << 16)) + set_bit(WDOG_HW_RUNNING, &priv->wdev.status); + watchdog_set_drvdata(&priv->wdev, priv); watchdog_init_timeout(&priv->wdev, timeout, dev);
_______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel