Re: [linux-pm] [PATCH 4/5] input: gpio-keys: switch to newdev_pm_ops

[Daniel Mack]

On Thu, Aug 06, 2009 at 02:51:55AM +0200, Rafael J. Wysocki wrote:
> On Thursday 06 August 2009, Daniel Mack wrote:
> > On Wed, Aug 05, 2009 at 10:15:52PM +0200, pHilipp Zabel wrote:
> > > On Wed, Aug 5, 2009 at 8:29 PM, Daniel Mack<daniel@xxxxxxxx> wrote:
> > > > -static int gpio_keys_resume(struct platform_device *pdev)
> > > > +static int gpio_keys_resume(struct device *dev)
> > > >  {
> > > > -       struct gpio_keys_platform_data *pdata = pdev->dev.platform_data;
> > > > +       struct gpio_keys_platform_data *pdata = dev->platform_data;
> > > >        int i;
> > > >
> > > > -       if (device_may_wakeup(&pdev->dev)) {
> > > > +       if (device_may_wakeup(dev)) {
> > > >                for (i = 0; i < pdata->nbuttons; i++) {
> > > >                        struct gpio_keys_button *button = &pdata->buttons[i];
> > > >                        if (button->wakeup) {
> > > > @@ -251,19 +251,27 @@ static int gpio_keys_resume(struct platform_device *pdev)
> > > >
> > > >        return 0;
> > > >  }
> > > > +
> > > > +static struct dev_pm_ops gpio_keys_pm_ops = {
> > > > +       .suspend        = gpio_keys_suspend,
> > > > +       .freeze         = gpio_keys_suspend,
> > > > +       .resume         = gpio_keys_resume,
> > > > +       .thaw           = gpio_keys_resume,
> > > 
> > > I'm not sure I understand hibernation correctly, but isn't
> > > .freeze/.thaw about saving state and halting/resuming the device
> > > operation only?
> 
> It is.
> 
> > > It seems to me that enabling system wakeup functionality should go
> > > into .poweroff. (See <linux/pm.h>)
> 
> That's correct.
> 
> And .restore() plays the role of ".resume() from hibernation".

Hence, In case of this driver which only calls disable_irq/enable_irq,
setting .poweroff and .restore seems to suffice? So does the patch
below.

Thanks,
Daniel