Re: [PATCH V3 0/8] ARM: cpuidle: Unify the ARM64/ARM DT approach

[Daniel Lezcano]

On 03/20/2015 07:31 PM, Lorenzo Pieralisi wrote:
> Hi Daniel,
>
> On Fri, Mar 20, 2015 at 11:43:53AM +0000, Daniel Lezcano wrote:
> > There is a big number of cpuidle drivers for the ARM architecture.
> >
> > These drivers have been cleaned up and grouped into the drivers/cpuidle
> > directory to keep track of the changes more easily and ensure the code
> > is following the same scheme across the drivers.
> >
> > That had the benefit of simplifying the code and factor out a lot of common
> > parts. Beside that, as the drivers belong to the 'drivers' directory, we had
> > to split the arch specific bits and the generic code in order to keep
> > everything self contained. The platform driver paradigm was used for this
> > purpose.
> >
> > Unfortunately, this approach is now no longer accepted and a different solution
> > must be provided to reach the same goal: one example is the Qualcomm cpuidle
> > driver upstreaming attempt.
> >
> > In the meantime, ARM64 developed a generic cpuidle driver based on DT definition.
> >
> > The DT definition provides an 'enable-method' to specify one of the cpu
> > operations (PSCI, ...).
> >
> > This patchset unify this driver with ARM32, using the same DT definition.
> >
> > Thanks with this patchset we can use the 'enable-method' to specify a cpu
> > operations, hence get rid of the platform driver approach and go further in the
> > cpuidle driver flexibility via the DT.
>
> I had a look and the series seems fine, if you have a branch I can pull from
> I will test on arm64 and add the required tags.

Yes, sure.

http://git.linaro.org/git-ro/people/daniel.lezcano/linux.git cpuidle/4.1

Thanks !

  -- Daniel


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