[PATCH] extcon: ptn5150: handle pending IRQ events during system resume

[PATCH] extcon: ptn5150: handle pending IRQ events during system resume

[Xu Yang]

When the system is suspended and ptn5150 wakeup interrupt is disabled,
any changes on ptn5150 will only be record in interrupt status
registers and won't fire an IRQ since its trigger type is falling
edge. So the HW interrupt line will keep at low state and any further
changes won't trigger IRQ anymore. To fix it, this will schedule a
work to check whether any IRQ are pending and handle it accordingly.

Signed-off-by: Xu Yang <xu.yang_2@nxp.com>
---
 drivers/extcon/extcon-ptn5150.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/drivers/extcon/extcon-ptn5150.c b/drivers/extcon/extcon-ptn5150.c
index 78ad86c4a3be..4f7dbba5accd 100644
--- a/drivers/extcon/extcon-ptn5150.c
+++ b/drivers/extcon/extcon-ptn5150.c
@@ -331,6 +331,19 @@ static int ptn5150_i2c_probe(struct i2c_client *i2c)
 	return 0;
 }
 
+static int ptn5150_resume(struct device *dev)
+{
+	struct i2c_client *i2c = to_i2c_client(dev);
+	struct ptn5150_info *info = i2c_get_clientdata(i2c);
+
+	/* Need to check possible pending interrupt events */
+	schedule_work(&info->irq_work);
+
+	return 0;
+}
+
+DEFINE_SIMPLE_DEV_PM_OPS(ptn5150_pm_ops, NULL, ptn5150_resume);
+
 static const struct of_device_id ptn5150_dt_match[] = {
 	{ .compatible = "nxp,ptn5150" },
 	{ },
@@ -346,6 +359,7 @@ MODULE_DEVICE_TABLE(i2c, ptn5150_i2c_id);
 static struct i2c_driver ptn5150_i2c_driver = {
 	.driver		= {
 		.name	= "ptn5150",
+		.pm = pm_sleep_ptr(&ptn5150_pm_ops),
 		.of_match_table = ptn5150_dt_match,
 	},
 	.probe		= ptn5150_i2c_probe,
-- 
2.34.1

Re: [PATCH] extcon: ptn5150: handle pending IRQ events during system resume

[Krzysztof Kozlowski]

On 14/11/2025 08:42, Xu Yang wrote:
>  
> +static int ptn5150_resume(struct device *dev)
> +{
> +	struct i2c_client *i2c = to_i2c_client(dev);
> +	struct ptn5150_info *info = i2c_get_clientdata(i2c);
> +
> +	/* Need to check possible pending interrupt events */
> +	schedule_work(&info->irq_work);
> +
> +	return 0;
> +}
> +
> +DEFINE_SIMPLE_DEV_PM_OPS(ptn5150_pm_ops, NULL, ptn5150_resume);

static

With this fixed:

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>

Best regards,
Krzysztof

Re: [PATCH] extcon: ptn5150: handle pending IRQ events during system resume

[Fabio Estevam]

On Fri, Nov 14, 2025 at 4:42 AM Xu Yang <xu.yang_2@nxp.com> wrote:
>
> When the system is suspended and ptn5150 wakeup interrupt is disabled,
> any changes on ptn5150 will only be record in interrupt status
> registers and won't fire an IRQ since its trigger type is falling
> edge. So the HW interrupt line will keep at low state and any further
> changes won't trigger IRQ anymore. To fix it, this will schedule a
> work to check whether any IRQ are pending and handle it accordingly.
>
> Signed-off-by: Xu Yang <xu.yang_2@nxp.com>

Fixes tag?

RE: [PATCH] extcon: ptn5150: handle pending IRQ events during system resume

[MyungJoo Ham]

>When the system is suspended and ptn5150 wakeup interrupt is disabled,
>any changes on ptn5150 will only be record in interrupt status
>registers and won't fire an IRQ since its trigger type is falling
>edge. So the HW interrupt line will keep at low state and any further
>changes won't trigger IRQ anymore. To fix it, this will schedule a
>work to check whether any IRQ are pending and handle it accordingly.

It is ok call ptn5150_irq_work() anytime during resume even if
irq-handler is invoked right before ptn5150_resume(), right?

Acked-by: MyungJoo Ham <myungjoo.ham@samsung.com>

>
>Signed-off-by: Xu Yang <xu.yang_2@nxp.com>
>---
> drivers/extcon/extcon-ptn5150.c | 14 ++++++++++++++
> 1 file changed, 14 insertions(+)
>

Re: [PATCH] extcon: ptn5150: handle pending IRQ events during system resume

[Xu Yang]

On Fri, Nov 14, 2025 at 09:08:24AM +0100, Krzysztof Kozlowski wrote:
> On 14/11/2025 08:42, Xu Yang wrote:
> >  
> > +static int ptn5150_resume(struct device *dev)
> > +{
> > +	struct i2c_client *i2c = to_i2c_client(dev);
> > +	struct ptn5150_info *info = i2c_get_clientdata(i2c);
> > +
> > +	/* Need to check possible pending interrupt events */
> > +	schedule_work(&info->irq_work);
> > +
> > +	return 0;
> > +}
> > +
> > +DEFINE_SIMPLE_DEV_PM_OPS(ptn5150_pm_ops, NULL, ptn5150_resume);
> 
> static
> 
> With this fixed:

Will do.

> 
> Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>

Thanks,
Xu Yang

> 
> Best regards,
> Krzysztof

Re: [PATCH] extcon: ptn5150: handle pending IRQ events during system resume

[Xu Yang]

On Fri, Nov 14, 2025 at 08:54:03AM -0300, Fabio Estevam wrote:
> On Fri, Nov 14, 2025 at 4:42 AM Xu Yang <xu.yang_2@nxp.com> wrote:
> >
> > When the system is suspended and ptn5150 wakeup interrupt is disabled,
> > any changes on ptn5150 will only be record in interrupt status
> > registers and won't fire an IRQ since its trigger type is falling
> > edge. So the HW interrupt line will keep at low state and any further
> > changes won't trigger IRQ anymore. To fix it, this will schedule a
> > work to check whether any IRQ are pending and handle it accordingly.
> >
> > Signed-off-by: Xu Yang <xu.yang_2@nxp.com>
> 
> Fixes tag?

Will add it in v2.

Thanks,
Xu Yang

Re: [PATCH] extcon: ptn5150: handle pending IRQ events during system resume

[Xu Yang]

Hi MyungJoo,

On Sat, Nov 15, 2025 at 10:01:45AM +0900, MyungJoo Ham wrote:
> >When the system is suspended and ptn5150 wakeup interrupt is disabled,
> >any changes on ptn5150 will only be record in interrupt status
> >registers and won't fire an IRQ since its trigger type is falling
> >edge. So the HW interrupt line will keep at low state and any further
> >changes won't trigger IRQ anymore. To fix it, this will schedule a
> >work to check whether any IRQ are pending and handle it accordingly.
> 
> It is ok call ptn5150_irq_work() anytime during resume even if
> irq-handler is invoked right before ptn5150_resume(), right?

Yes, it's ok because the mutex lock will protect it and if irq-handler
is invoked firstly, ptn5150_resume() will just read the status registers
and return soon since no pending events.

> 
> Acked-by: MyungJoo Ham <myungjoo.ham@samsung.com>

Thanks,
Xu Yang

> 
> >
> >Signed-off-by: Xu Yang <xu.yang_2@nxp.com>
> >---
> > drivers/extcon/extcon-ptn5150.c | 14 ++++++++++++++
> > 1 file changed, 14 insertions(+)
> >