Re: [PATCH 1/5] PM / Runtime: Support for generic I/O power domains (v3)

[Lin Ming <minggr@gmail.com>]

On Mon, May 9, 2011 at 5:22 AM, Rafael J. Wysocki <rjw@sisk.pl> wrote:
> From: Rafael J. Wysocki <rjw@sisk.pl>

> +
> +/**
> + * __pm_genpd_restore_device - Restore a pre-suspend state of a device.
> + * @dev: Device to restore the state of.
> + * @genpd: Power domain the device belongs to.
> + */
> +static void __pm_genpd_restore_device(struct device *dev,
> +                                     struct generic_power_domain *genpd)
> +{
> +       struct device_driver *drv = dev->driver;
> +
> +       if (genpd->start_device)
> +               genpd->start_device(dev);
> +
> +       if (drv && drv->pm && drv->pm->runtime_resume)
> +               drv->pm->runtime_resume(dev);
> +
> +       if (genpd->stop_device)
> +               genpd->stop_device(dev);
> +}

Why call ->stop_device in restore function?

BTW,
you implemented power domains for ARM / shmobile,
What can we do for other arches?
I wonder how to implement this "power domain" on x86.

Thanks,
Lin Ming