diff options
| author | Yen-Chi Huang <jesse.huang@portwell.com.tw> | 2025-08-28 13:31:17 +0800 |
|---|---|---|
| committer | Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> | 2025-08-28 14:52:54 +0300 |
| commit | 54cf44517550d53960d2fc5f85cf55d668c8889d (patch) | |
| tree | 9ee78d4537427911578a12ce6702f39d984625d2 | |
| parent | 30359c239ba8394c8e774151d26914db18dc4976 (diff) | |
platform/x86: portwell-ec: Add suspend/resume support for watchdog
Portwell EC does not disable the watchdog during suspend. To avoid unwanted
resets, this patch adds suspend and resume callbacks (pwec_suspend() and
pwec_resume()) to the driver.
The watchdog is stopped in pwec_suspend() and restarted in pwec_resume() if
it was active before suspend.
Signed-off-by: Yen-Chi Huang <jesse.huang@portwell.com.tw>
Link: https://lore.kernel.org/r/c9cfe602-c279-4aa4-9932-76f47f26556c@portwell.com.tw
[ij: removed extra "3"]
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
| -rw-r--r-- | drivers/platform/x86/portwell-ec.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/drivers/platform/x86/portwell-ec.c b/drivers/platform/x86/portwell-ec.c index 322f296e9315..d2e91d5c3b3a 100644 --- a/drivers/platform/x86/portwell-ec.c +++ b/drivers/platform/x86/portwell-ec.c @@ -30,6 +30,7 @@ #include <linux/ioport.h> #include <linux/module.h> #include <linux/platform_device.h> +#include <linux/pm.h> #include <linux/sizes.h> #include <linux/string.h> #include <linux/watchdog.h> @@ -246,9 +247,28 @@ static int pwec_probe(struct platform_device *pdev) return 0; } +static int pwec_suspend(struct device *dev) +{ + if (watchdog_active(&ec_wdt_dev)) + return pwec_wdt_stop(&ec_wdt_dev); + + return 0; +} + +static int pwec_resume(struct device *dev) +{ + if (watchdog_active(&ec_wdt_dev)) + return pwec_wdt_start(&ec_wdt_dev); + + return 0; +} + +static DEFINE_SIMPLE_DEV_PM_OPS(pwec_dev_pm_ops, pwec_suspend, pwec_resume); + static struct platform_driver pwec_driver = { .driver = { .name = "portwell-ec", + .pm = pm_sleep_ptr(&pwec_dev_pm_ops), }, .probe = pwec_probe, }; |