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

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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.
This was tested and verified on a target.

(cherry picked from commit 7afe69ad9221a77dc782b81f49cd7f99987740ed https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git/ usb-next)

Bug: 234808630
Link: https://lore.kernel.org/r/1653634146-12215-1-git-send-email-quic_prashk@quicinc.com
Signed-off-by: Prashanth K <quic_prashk@quicinc.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Change-Id: I8767f91aa78805984856334821072e0c7986eea0
This commit is contained in:
Prashanth K
2022-05-27 12:19:06 +05:30
committed by Todd Kjos
parent d41cf0b55b
commit 564ba93050
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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@@ -275,6 +275,7 @@ 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);
@@ -304,6 +305,14 @@ 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)
@@ -318,6 +327,14 @@ 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)