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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: Prashanth K <quic_prashk@quicinc.com>
Link: https://lore.kernel.org/r/1653634146-12215-1-git-send-email-quic_prashk@quicinc.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Prashanth K 2022-05-27 12:19:06 +05:30 committed by Greg Kroah-Hartman
parent 62e4efe337
commit 7afe69ad92
1 changed files with 17 additions and 0 deletions
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17
drivers/usb/common/usb-conn-gpio.c
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@ -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)