Thread (27 messages) 27 messages, 8 authors, 2014-09-29

[PATCH v8 6/8] drivers: cpuidle: CPU idle ARM64 driver

From: Tomasz Figa <hidden>
Date: 2014-09-14 16:59:20
Also in: linux-devicetree, linux-pm

[dropping my old @samsung.com address]

On 11.09.2014 10:57, Lorenzo Pieralisi wrote:
On Thu, Sep 11, 2014 at 09:28:06AM +0100, Daniel Lezcano wrote:
quoted
On 09/05/2014 05:34 PM, Lorenzo Pieralisi wrote:
quoted
On Fri, Sep 05, 2014 at 10:21:20AM +0100, Will Deacon wrote:
quoted
On Thu, Sep 04, 2014 at 06:29:10PM +0100, Lorenzo Pieralisi wrote:
quoted
On Thu, Sep 04, 2014 at 05:03:20PM +0100, Catalin Marinas wrote:
quoted
On Wed, Sep 03, 2014 at 06:37:40PM +0100, Lorenzo Pieralisi wrote:
quoted
This patch should be ready to go too, is it ok if I split the series
in arm64 arch specific patches (will ask Catalin to pull) and CPUidle ones
(inclusive of DT bindings and !!this patch!!) and send two separate pull
requests ?
If Daniel/Rafael don't have any objection, I can take the whole series
through the arm64 tree (it seems that patches have been already acked by
Daniel).
Thanks a lot Catalin. Since this one is a brand new CPUidle driver and it
follows a different pattern from arm legacy drivers I would like to get
Daniel's ack on this patch too before pushing it. For the records I have
just added two pr_err to signal driver probing error, ultraminor changes
that do not justify a repost.

If Samsung guys do not manifest themselves I would drop patch 8 from
the series till it gets tested and its patch dependency queued too.
The last patch also has a dependency, as you mentioned to Daniel. I think
we can certainly merge the arm64 parts, and if Daniel doesn't object, then
we can take the driver stuff too but leaving the exynos bits out (i.e. drop
the last patch).

Anyway, if you could repost with the acks you've collected and rearrange it
so the arm64 patches are first in the series, that would be great.
I can repost it with the acks and rearrange the patches, but for the
pull request I have to know what code can be merged, since there are
some arm64 patches (PSCI and CPUidle arm64 back-end) that are strictly
tied to the arm64 CPUidle driver, so I *have* to know if the arm64
CPUidle driver (this patch) can get merged and that requires an ack.

If I do not hear from Samsung guys I will drop patch 8.
Well I would prefer to have this patch merged (Cc'ing Tomasz).
Ok, but:

a) I only compile tested it
b) There is a dts patch dependency for patch 8 to apply cleanly and it
   hasn't been acked (I can't really do it since I can't test it)

   http://lists.infradead.org/pipermail/linux-arm-kernel/2014-July/274179.html

So, what should we do ? Tomasz ?
Sorry for late reply. I don't work for Samsung anymore so I don't focus
that much on areas other than I still maintain.

As for b) I believe all my patches have been already merged and now
we're just waiting for Kukjin to apply Bart's patch (although it's been
sitting on the ML since July, so probably needs rebasing).

About the patch 8 alone, somebody would have to test it. Maybe Bart or
Krzysztof could find some time to look at this? Other than that, I'm not
quite sure about entry latency you specified. It would look like
entering the state takes longer time than leaving, which I believe is
not the case. However I can't find any place in the code which would use
entry latency, so it might not be that important for now.

Best regards,
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