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From: khilman@linaro.org (Kevin Hilman)
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 08:32:01 -0700	[thread overview]
Message-ID: <7h8umc60we.fsf@paris.lan> (raw)
In-Reply-To: <CADWw7OgAS-z-UOrJU-hL2fzuefJmLtCTg57jYk2Df7f5KfLJmA@mail.gmail.com> (Chander Kashyap's message of "Mon, 25 Aug 2014 17:45:07 +0530")

Hi Chander,

Chander Kashyap <k.chander@samsung.com> writes:

[...]

>>> 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.
>
> I have tested this patch series on SMDK5420 with cpuidle (with and
> without b.L switcher enabled).
>
> As of now voltage scaling support is not there in generic big-little
> cpufreq driver (arm_big_little.c).
> Hence need to tie arm and kfc voltages to highest level for testing.

> Without this change stability issues are there, but with this change
> everything is stable.

Can you clarify how you're setting the voltages to ensure stability?

Tomasz, I didn't mean to suggest this isn't ready for mainline.  For the
5420/5800 it seems cpufreq support is a new feature, so this isn't a
regression against previous (mainline) behavior.  Maybe the big.LITTLE
cpufreq support should've been separated out from the cleanup since it's
more of a new feature, but that's up to you.

Kevin

  reply	other threads:[~2014-08-25 15:32 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 [this message]
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
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

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