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authorShinya Kuribayashi <shinya.kuribayashi.px@renesas.com>2012-05-17 15:11:06 +0400
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2012-05-17 22:20:34 +0400
commit7cbb062ade87b987a24aa834bbde32ad8374a4cf (patch)
treeec7dd2e6d4fb69060a32f4b8ca52cccbad50f3c9 /drivers/usb/otg
parentec1ac6e1690adf4087afdc706770cb6fb732157b (diff)
downloadlinux-7cbb062ade87b987a24aa834bbde32ad8374a4cf.tar.xz
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>
Diffstat (limited to 'drivers/usb/otg')
-rw-r--r--drivers/usb/otg/gpio_vbus.c33
1 files changed, 33 insertions, 0 deletions
diff --git a/drivers/usb/otg/gpio_vbus.c b/drivers/usb/otg/gpio_vbus.c
index 1e6bd0347aff..bde6298a9693 100644
--- a/drivers/usb/otg/gpio_vbus.c
+++ b/drivers/usb/otg/gpio_vbus.c
@@ -327,6 +327,8 @@ static int __init gpio_vbus_probe(struct platform_device *pdev)
goto err_otg;
}
+ device_init_wakeup(&pdev->dev, pdata->wakeup);
+
return 0;
err_otg:
regulator_put(gpio_vbus->vbus_draw);
@@ -348,6 +350,7 @@ static int __exit gpio_vbus_remove(struct platform_device *pdev)
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 @@ static int __exit gpio_vbus_remove(struct platform_device *pdev)
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 @@ static struct platform_driver gpio_vbus_driver = {
.driver = {
.name = "gpio-vbus",
.owner = THIS_MODULE,
+#ifdef CONFIG_PM
+ .pm = &gpio_vbus_dev_pm_ops,
+#endif
},
.remove = __exit_p(gpio_vbus_remove),
};