From: Linus Walleij <linus.walleij@linaro.org>
Date: Mon, 7 Feb 2022 00:00:28 +0100
Subject: watchdog: ixp4xx: Implement restart
Git-commit: 1aea522809e67f42295ceb1d21429d76c43697e4
Patch-mainline: v5.18-rc1
References: bsc#1208619
Implement watchdog restart in the IXP4xx watchdog timer.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20220206230028.476659-1-linus.walleij@linaro.org
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>
Acked-by: Joerg Roedel <jroedel@suse.de>
---
drivers/watchdog/ixp4xx_wdt.c | 14 ++++++++++++++
1 file changed, 14 insertions(+)
diff --git a/drivers/watchdog/ixp4xx_wdt.c b/drivers/watchdog/ixp4xx_wdt.c
index 31b03fa71341..281a48d9889f 100644
--- a/drivers/watchdog/ixp4xx_wdt.c
+++ b/drivers/watchdog/ixp4xx_wdt.c
@@ -84,10 +84,24 @@ static int ixp4xx_wdt_set_timeout(struct watchdog_device *wdd,
return 0;
}
+static int ixp4xx_wdt_restart(struct watchdog_device *wdd,
+ unsigned long action, void *data)
+{
+ struct ixp4xx_wdt *iwdt = to_ixp4xx_wdt(wdd);
+
+ __raw_writel(IXP4XX_WDT_KEY, iwdt->base + IXP4XX_OSWK_OFFSET);
+ __raw_writel(0, iwdt->base + IXP4XX_OSWT_OFFSET);
+ __raw_writel(IXP4XX_WDT_COUNT_ENABLE | IXP4XX_WDT_RESET_ENABLE,
+ iwdt->base + IXP4XX_OSWE_OFFSET);
+
+ return 0;
+}
+
static const struct watchdog_ops ixp4xx_wdt_ops = {
.start = ixp4xx_wdt_start,
.stop = ixp4xx_wdt_stop,
.set_timeout = ixp4xx_wdt_set_timeout,
+ .restart = ixp4xx_wdt_restart,
.owner = THIS_MODULE,
};