From: sjoerd.simons@collabora.co.uk (Sjoerd Simons)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v9 4/6] ARM: Exynos: switch to using generic cpufreq driver for Exynos4210/5250/5420
Date: Mon, 25 Aug 2014 10:11:37 +0200 [thread overview]
Message-ID: <1408954297.31096.7.camel@collabora.co.uk> (raw)
In-Reply-To: <7hbnrc6px3.fsf@paris.lan>
Hey,
On Fri, 2014-08-22 at 16:54 -0700, Kevin Hilman wrote:
> Tomasz Figa <tomasz.figa@gmail.com> writes:
>
> > Kukjin,
> >
> > On 31.07.2014 20:32, Kukjin Kim wrote:
> >> On 07/30/14 17:07, Thomas Abraham wrote:
> >>> The new CPU clock type allows the use of generic CPUfreq drivers. So for
> >>> Exynos4210/5250, switch to using generic cpufreq driver. For Exynos5420,
> >>> which did not have CPUfreq driver support, enable the use of generic
> >>> CPUfreq driver.
> >>>
> >>> Suggested-by: Tomasz Figa<t.figa@samsung.com>
> >>> Cc: Kukjin Kim<kgene.kim@samsung.com>
> >>
> >> Looks good to me,
> >>
> >> Acked-by: Kukjin Kim <kgene.kim@samsung.com>
> >>
> >> BTW, who will handle this series? I hope see this series in 3.17.
> >
> > This series consists mostly of clock changes and it likely depends on
> > patches already in my for-next, so I would be inclined toward taking it
> > through samsung-clk tree.
>
> So has this series been picked up anywhere? I don't see it in your
> samsung-clk tree, nor in Kukjin's for-next.
>
> Also, I'm curious whether or how this is has been tested on big.LITTLE
> SoCs.
>
> I'm trying it on the 5800/Chromebook2 and it's not terribly stable. I'm
> testing along with CPUidle, so there may be some untested interactions
> there as it seems a bit more stable without CPUidle enabled.
>
> I'd love to hear from anyone else that's testing CPUidle and CPUfreq
> together big.LITTLE 5420/5800, with or without the switcher.
>
> Also, the patch below[2] is needed for 5800.
For reference, I had the same patch in a kernel tree we recently used
for a demo on the chromebook 2 13" (Exynos 5800). We didn't see any
stability issues due to this without CPUidle (using the ondemand
govenor). The kernel we ended up using had CONFIG_BL_SWITCHER disabled,
but i don't remember seeing stability issues when i did a testrun with
that enabled.
--
Sjoerd Simons <sjoerd.simons@collabora.co.uk>
Collabora Ltd.
-------------- next part --------------
A non-text attachment was scrubbed...
Name: smime.p7s
Type: application/x-pkcs7-signature
Size: 6170 bytes
Desc: not available
URL: <http://lists.infradead.org/pipermail/linux-arm-kernel/attachments/20140825/e02aa78e/attachment.bin>
next prev parent reply other threads:[~2014-08-25 8:11 UTC|newest]
Thread overview: 61+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-07-30 8:07 [PATCH v9 0/6] cpufreq: use generic cpufreq drivers for exynos platforms Thomas Abraham
2014-07-30 8:07 ` [PATCH v9 1/6] clk: samsung: add infrastructure to register cpu clocks Thomas Abraham
2014-09-01 22:29 ` Mike Turquette
2014-09-02 13:53 ` Thomas Abraham
2014-07-30 8:07 ` [PATCH v9 2/6] clk: samsung: add cpu clock configuration data and instantiate cpu clock Thomas Abraham
2014-09-01 22:29 ` Mike Turquette
2014-07-30 8:07 ` [PATCH v9 3/6] ARM: dts: Exynos: add CPU OPP and regulator supply property Thomas Abraham
2014-07-30 11:28 ` Andreas Färber
2014-07-31 2:55 ` Thomas Abraham
2014-07-31 0:37 ` Doug Anderson
2014-07-31 3:21 ` Thomas Abraham
2014-07-31 3:53 ` Doug Anderson
2014-07-31 4:06 ` Thomas Abraham
2014-07-31 4:08 ` Doug Anderson
2014-07-31 4:18 ` Thomas Abraham
2014-08-02 3:49 ` Javier Martinez Canillas
2014-08-04 3:00 ` Thomas Abraham
2014-07-30 8:07 ` [PATCH v9 4/6] ARM: Exynos: switch to using generic cpufreq driver for Exynos4210/5250/5420 Thomas Abraham
2014-07-31 18:32 ` Kukjin Kim
2014-07-31 18:40 ` Tomasz Figa
2014-07-31 18:54 ` Tomasz Figa
2014-07-31 19:25 ` Thomas Abraham
2014-07-31 19:30 ` Tomasz Figa
2014-08-04 3:24 ` Thomas Abraham
2014-08-22 23:54 ` Kevin Hilman
2014-08-23 0:02 ` Tomasz Figa
2014-08-25 6:53 ` Lukasz Majewski
2014-08-25 12:15 ` Chander Kashyap
2014-08-25 15:32 ` Kevin Hilman
2014-08-25 15:56 ` Tomasz Figa
2014-08-26 4:54 ` Viresh Kumar
2014-08-26 5:25 ` Chander Kashyap
2014-08-26 15:15 ` Kevin Hilman
2014-08-26 22:25 ` Kevin Hilman
2014-08-29 12:52 ` Thomas Abraham
2014-08-29 15:03 ` Kevin Hilman
2014-09-01 8:47 ` Thomas Abraham
2014-09-02 19:32 ` Kevin Hilman
2014-09-03 4:26 ` Thomas Abraham
2014-09-03 13:18 ` Thomas Abraham
2014-09-03 23:15 ` Kevin Hilman
2014-09-04 10:22 ` Thomas Abraham
2014-09-04 13:30 ` Kevin Hilman
2014-09-05 13:41 ` Thomas Abraham
2014-08-25 8:11 ` Sjoerd Simons [this message]
2014-07-30 8:07 ` [PATCH v9 5/6] cpufreq: exynos: remove exynos4210/5250 specific cpufreq driver support Thomas Abraham
2014-07-30 8:07 ` [PATCH v9 6/6] clk: samsung: remove unused clock aliases and update clock flags Thomas Abraham
2014-07-31 14:13 ` Tomasz Figa
2014-07-31 18:24 ` Thomas Abraham
2014-07-31 18:35 ` Tomasz Figa
2014-07-31 18:41 ` Thomas Abraham
2014-07-31 18:46 ` Tomasz Figa
2014-07-31 18:49 ` Thomas Abraham
2014-09-01 22:31 ` Mike Turquette
2014-07-31 6:20 ` [PATCH v9 0/6] cpufreq: use generic cpufreq drivers for exynos platforms Chander M. Kashyap
2014-07-31 10:59 ` Thomas Abraham
2014-07-31 12:24 ` Chander M. Kashyap
2014-07-31 14:15 ` Tomasz Figa
2014-07-31 18:25 ` Thomas Abraham
2014-07-31 18:34 ` Thomas Abraham
2014-08-01 9:42 ` Viresh Kumar
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1408954297.31096.7.camel@collabora.co.uk \
--to=sjoerd.simons@collabora.co.uk \
--cc=linux-arm-kernel@lists.infradead.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).