diff options
| author | Shinya Kuribayashi <shinya.kuribayashi.px@renesas.com> | 2012-05-17 13:11:06 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-05-17 20:20:34 +0200 |
| commit | 7cbb062ade87b987a24aa834bbde32ad8374a4cf (patch) | |
| tree | ec7dd2e6d4fb69060a32f4b8ca52cccbad50f3c9 /drivers | |
| parent | USB: gpio_vbus: a missing cancellation of workqueue in remove() function (diff) | |
| download | linux-7cbb062ade87b987a24aa834bbde32ad8374a4cf.tar.xz linux-7cbb062ade87b987a24aa834bbde32ad8374a4cf.zip | |
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')
| -rw-r--r-- | drivers/usb/otg/gpio_vbus.c | 33 |
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), }; |