diff mbox series

[v2,6/7] watchdog: imx7ulp_wdt: init wdog when it was active

Message ID 20220825083256.14565-7-alice.guo@oss.nxp.com
State New
Headers show
Series watchdog: imx7ulp_wdt: update i.MX7ULP WDOG timer driver | expand

Commit Message

Alice Guo (OSS) Aug. 25, 2022, 8:32 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>
---

Changes for v2:
 - none

 drivers/watchdog/imx7ulp_wdt.c | 13 +++----------
 1 file changed, 3 insertions(+), 10 deletions(-)

Comments

Guenter Roeck Sept. 25, 2022, 5:38 p.m. UTC | #1 
On Thu, Aug 25, 2022 at 04:32:55PM +0800, Alice Guo (OSS) wrote:
> 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>

Reviewed-by: Guenter Roeck <linux@roeck-us.net>

> ---
> 
> Changes for v2:
>  - none
> 
>  drivers/watchdog/imx7ulp_wdt.c | 13 +++----------
>  1 file changed, 3 insertions(+), 10 deletions(-)
> 
> diff --git a/drivers/watchdog/imx7ulp_wdt.c b/drivers/watchdog/imx7ulp_wdt.c
> index 0cafa86fff7f..dee02c2a52c9 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;
>  }
> -- 
> 2.17.1
>
diff mbox series

Patch

diff --git a/drivers/watchdog/imx7ulp_wdt.c b/drivers/watchdog/imx7ulp_wdt.c
index 0cafa86fff7f..dee02c2a52c9 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;
 }