diff mbox series

[6/7] watchdog: imx7ulp_wdt: init wdog when it was active

Message ID 20220816043643.26569-7-alice.guo@oss.nxp.com
State Superseded
Headers show
Series watchdog: imx7ulp_wdt: update i.MX7ULP WDOG timer driver | expand

Commit Message

Alice Guo (OSS) Aug. 16, 2022, 4:36 a.m. UTC 
From: Jason Liu <jason.hui.liu@nxp.com>

Paired with suspend, we can only init wdog again when it was active
and ping it once to avoid the watchdog timeout after it resumed.

Signed-off-by: Jason Liu <jason.hui.liu@nxp.com>
Signed-off-by: Alice Guo <alice.guo@nxp.com>
Reviewed-by: Ye Li <ye.li@nxp.com>
Reviewed-by: Jacky Bai <ping.bai@nxp.com>
Tested-by: Jacky Bai <ping.bai@nxp.com>
---
 drivers/watchdog/imx7ulp_wdt.c | 13 +++----------
 1 file changed, 3 insertions(+), 10 deletions(-)
diff mbox series

Patch

diff --git a/drivers/watchdog/imx7ulp_wdt.c b/drivers/watchdog/imx7ulp_wdt.c
index 51eaaf24bd8f..58508f69d933 100644
--- a/drivers/watchdog/imx7ulp_wdt.c
+++ b/drivers/watchdog/imx7ulp_wdt.c
@@ -136,13 +136,6 @@  static int imx7ulp_wdt_enable(struct watchdog_device *wdog, bool enable)
 	return ret;
 }
 
-static bool imx7ulp_wdt_is_enabled(void __iomem *base)
-{
-	u32 val = readl(base + WDOG_CS);
-
-	return val & WDOG_CS_EN;
-}
-
 static int imx7ulp_wdt_ping(struct watchdog_device *wdog)
 {
 	struct imx7ulp_wdt_device *wdt = watchdog_get_drvdata(wdog);
@@ -382,11 +375,11 @@  static int __maybe_unused imx7ulp_wdt_resume_noirq(struct device *dev)
 	if (ret)
 		return ret;
 
-	if (imx7ulp_wdt_is_enabled(imx7ulp_wdt->base))
+	if (watchdog_active(&imx7ulp_wdt->wdd)) {
 		imx7ulp_wdt_init(imx7ulp_wdt, timeout);
-
-	if (watchdog_active(&imx7ulp_wdt->wdd))
 		imx7ulp_wdt_start(&imx7ulp_wdt->wdd);
+		imx7ulp_wdt_ping(&imx7ulp_wdt->wdd);
+	}
 
 	return 0;
 }