On Tue, Nov 10, 2015 at 12:12:30PM +0100, Ulf Hansson wrote:
> On 10 November 2015 at 11:36, Ludovic Desroches
> <ludovic.desroches@xxxxxxxxx> wrote:
> > Add runtime PM support and use runtime_force_suspend|resume() for system
> > PM.
> >
[...]
> > static int sdhci_at91_probe(struct platform_device *pdev)
> > {
> > const struct of_device_id *match;
> > @@ -148,6 +206,11 @@ static int sdhci_at91_probe(struct platform_device *pdev)
> > if (ret)
> > goto clocks_disable_unprepare;
> >
> > + pm_runtime_set_active(&pdev->dev);
> > + pm_runtime_enable(&pdev->dev);
> > + pm_runtime_set_autosuspend_delay(&pdev->dev, 50);
> > + pm_runtime_use_autosuspend(&pdev->dev);
>
> Move these four runtime PM calls above sdhci_add_host(), as after that
> point the host is used and thus runtime PM operations starts.
Sadly I have discovered a bit late it is not working when doing this
because the controller has been suspended before doing the
sdhci_add_host().
What is the right way to fix it? Calling pm_runtime_get_noresume()
before sdhci_add_host() and calling pm_runtime_put_autosuspend() after?
>
> > +
> > return 0;
> >
> > clocks_disable_unprepare:
> > @@ -165,6 +228,7 @@ static int sdhci_at91_remove(struct platform_device *pdev)
> > struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
> > struct sdhci_at91_priv *priv = pltfm_host->priv;
> >
Regards
Ludovic
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