lkml.org 
[lkml]   [2014]   [Mar]   [19]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH v11 19/27] iommu/exynos: add support for power management subsystems.
On Tue, 18 Mar 2014 16:33:04 +0100, Tomasz Figa wrote:
> On 18.03.2014 12:23, Cho KyongHo wrote:
> > On Fri, 14 Mar 2014 17:07:53 +0100, Tomasz Figa wrote:
> >> Hi KyongHo,
> >>
> >> On 14.03.2014 06:10, Cho KyongHo wrote:
>
> [snip]
>
> >>> @@ -677,11 +679,40 @@ static int __init exynos_sysmmu_probe(struct platform_device *pdev)
> >>> platform_set_drvdata(pdev, data);
> >>>
> >>> pm_runtime_enable(dev);
> >>> + data->runtime_active = !pm_runtime_enabled(dev);
> >>
> >> Hmm, this seems to be a bit misleading. The field is named
> >> runtime_active, but the assignment makes it true if PM runtime is _not_
> >> enabled (i.e. inactive). Is this correct?
> >>
> >
> > I agree that it may lead misunderstood.
> > data->runtime_active actually indicates if electric power is asserted
> > to the System MMU. pm_runtime_enable() call must enable runtime pm
> > for the given device. If runtime pm is not enabled although pm_runtime_enable()
> > is called, CONFIG_PM_RUNTIME is not configured.
> >
> > Actually, it is replacible with
> > if (IS_ENABLED(CONFIG_PM_RUNTIME))
> > data->runtime_active = true;
>
> I would keep it as !pm_runtime_enabled(dev), but rename the field to
> something more meaningful, like data->is_powered_on.
>

That is good idea.

thanks for advice.

KyongHo.


\
 
 \ /
  Last update: 2014-03-19 10:41    [W:0.053 / U:0.108 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site