Kernel/linux
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git synced 2025-01-04 04:04:19 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

watchdog: imx7ulp_wdt: init wdog when it was active

Browse Source 
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>
Link: https://lore.kernel.org/r/20220825083256.14565-7-alice.guo@oss.nxp.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>
This commit is contained in:
Jason Liu 2022-08-25 16:32:55 +08:00 committed by Wim Van Sebroeck
parent c32b53f965
commit cef6bc98d5
1 changed files with 3 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
drivers/watchdog/imx7ulp_wdt.c
View File

@ -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;
}