From: Daniel Palmer Date: Tue, 28 Dec 2021 07:34:27 +0000 (+0900) Subject: watchdog: msc313e: Check if the WDT was running at boot X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=ffd264bd152cbf88fcf5ced04d3d380c77020231;p=linux.git watchdog: msc313e: Check if the WDT was running at boot 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 Reviewed-by: Romain Perier Reviewed-by: Guenter Roeck Link: https://lore.kernel.org/r/20211228073427.2443174-1-daniel@0x0f.com Signed-off-by: Guenter Roeck Signed-off-by: Wim Van Sebroeck --- diff --git a/drivers/watchdog/msc313e_wdt.c b/drivers/watchdog/msc313e_wdt.c index 0d497aa0fb7d9..90171431fc594 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);