Commit 7afe69ad authored by Prashanth K's avatar Prashanth K Committed by Greg Kroah-Hartman
Browse files

usb: common: usb-conn-gpio: Allow wakeup from system suspend 



Currently the VBUS/ID detection interrupts are disabled during system
suspend. So the USB cable connect/disconnect event can't wakeup the
system from low power mode. To allow this, we keep these interrupts
enabled and configure them as wakeup capable. This behavior can be
controlled through device wakeup source policy by the user space.

Signed-off-by: default avatarPrashanth K <quic_prashk@quicinc.com>
Link: https://lore.kernel.org/r/1653634146-12215-1-git-send-email-quic_prashk@quicinc.com


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 62e4efe3

drivers/usb/common/usb-conn-gpio.c

+17 −0
Original line number Diff line number Diff line
@@ -257,6 +257,7 @@ static int usb_conn_probe(struct platform_device *pdev) 
	}



	platform_set_drvdata(pdev, info);

	device_set_wakeup_capable(&pdev->dev, true);



	/* Perform initial detection */

	usb_conn_queue_dwork(info, 0);
@@ -286,6 +287,14 @@ static int __maybe_unused usb_conn_suspend(struct device *dev) 
{

	struct usb_conn_info *info = dev_get_drvdata(dev);



	if (device_may_wakeup(dev)) {

		if (info->id_gpiod)

			enable_irq_wake(info->id_irq);

		if (info->vbus_gpiod)

			enable_irq_wake(info->vbus_irq);

		return 0;

	}



	if (info->id_gpiod)

		disable_irq(info->id_irq);

	if (info->vbus_gpiod)
@@ -300,6 +309,14 @@ static int __maybe_unused usb_conn_resume(struct device *dev) 
{

	struct usb_conn_info *info = dev_get_drvdata(dev);



	if (device_may_wakeup(dev)) {

		if (info->id_gpiod)

			disable_irq_wake(info->id_irq);

		if (info->vbus_gpiod)

			disable_irq_wake(info->vbus_irq);

		return 0;

	}



	pinctrl_pm_select_default_state(dev);



	if (info->id_gpiod)