diff options
| author | Prashanth K <quic_prashk@quicinc.com> | 2022-05-27 12:19:06 +0530 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-06-10 11:48:41 +0200 |
| commit | 7afe69ad9221a77dc782b81f49cd7f99987740ed (patch) | |
| tree | 17b26235ded90c4dac4739c7d1d38103d74444d1 /drivers/usb/common | |
| parent | 62e4efe3375eb30292dabaec4481dc04550d3644 (diff) | |
| download | lwn-7afe69ad9221a77dc782b81f49cd7f99987740ed.tar.gz lwn-7afe69ad9221a77dc782b81f49cd7f99987740ed.zip | |
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>
Diffstat (limited to 'drivers/usb/common')
| -rw-r--r-- | drivers/usb/common/usb-conn-gpio.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/drivers/usb/common/usb-conn-gpio.c b/drivers/usb/common/usb-conn-gpio.c index 395f9bbe3056..b39c9f1c375d 100644 --- a/drivers/usb/common/usb-conn-gpio.c +++ b/drivers/usb/common/usb-conn-gpio.c @@ -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) |