USB: gpio_vbus: wakeup support on GPIO VBUS interrupts
We'd like to see the system waking up from the system-wide suspend
when it gets plugged-in, or the USB cable is pulled out.
Also makes it configurable via platform data 'wakeup'.
Signed-off-by: Shinya Kuribayashi <shinya.kuribayashi.px@renesas.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/usb/otg/gpio_vbus.c b/drivers/usb/otg/gpio_vbus.c
index 1e6bd03..bde6298 100644
--- a/drivers/usb/otg/gpio_vbus.c
+++ b/drivers/usb/otg/gpio_vbus.c
@@ -327,6 +327,8 @@
goto err_otg;
}
+ device_init_wakeup(&pdev->dev, pdata->wakeup);
+
return 0;
err_otg:
regulator_put(gpio_vbus->vbus_draw);
@@ -348,6 +350,7 @@
struct gpio_vbus_mach_info *pdata = pdev->dev.platform_data;
int gpio = pdata->gpio_vbus;
+ device_init_wakeup(&pdev->dev, 0);
cancel_delayed_work_sync(&gpio_vbus->work);
regulator_put(gpio_vbus->vbus_draw);
@@ -364,6 +367,33 @@
return 0;
}
+#ifdef CONFIG_PM
+static int gpio_vbus_pm_suspend(struct device *dev)
+{
+ struct gpio_vbus_data *gpio_vbus = dev_get_drvdata(dev);
+
+ if (device_may_wakeup(dev))
+ enable_irq_wake(gpio_vbus->irq);
+
+ return 0;
+}
+
+static int gpio_vbus_pm_resume(struct device *dev)
+{
+ struct gpio_vbus_data *gpio_vbus = dev_get_drvdata(dev);
+
+ if (device_may_wakeup(dev))
+ disable_irq_wake(gpio_vbus->irq);
+
+ return 0;
+}
+
+static const struct dev_pm_ops gpio_vbus_dev_pm_ops = {
+ .suspend = gpio_vbus_pm_suspend,
+ .resume = gpio_vbus_pm_resume,
+};
+#endif
+
/* NOTE: the gpio-vbus device may *NOT* be hotplugged */
MODULE_ALIAS("platform:gpio-vbus");
@@ -372,6 +402,9 @@
.driver = {
.name = "gpio-vbus",
.owner = THIS_MODULE,
+#ifdef CONFIG_PM
+ .pm = &gpio_vbus_dev_pm_ops,
+#endif
},
.remove = __exit_p(gpio_vbus_remove),
};