linux-kernel - Re: [GIT PULL] ARM: EXYNOS: mach: Improvements for 4.3

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Date:	Tue, 21 Jul 2015 14:21:23 +0900
From:	Krzysztof Kozlowski <k.kozlowski@...sung.com>
To:	Krzysztof Kozlowski <k.kozlowski@...sung.com>
Cc:	Kukjin Kim <kgene@...nel.org>,
	linux-arm-kernel@...ts.infradead.org,
	linux-samsung-soc@...r.kernel.org, linux-kernel@...r.kernel.org,
	Bartłomiej Żołnierkiewicz 
	<b.zolnierkie@...sung.com>
Subject: Re: [GIT PULL] ARM: EXYNOS: mach: Improvements for 4.3

2015-07-21 14:13 GMT+09:00 Krzysztof Kozlowski <k.kozlowski@...sung.com>:
> 2015-07-21 14:02 GMT+09:00 Kukjin Kim <kgene@...nel.org>:
>> Krzysztof Kozlowski wrote:
>>>
>>> Dear Kukjin,
>>>
>>> Exynos mach-code related improvements. Description along with a tag.
>>> You can find them also on the lists with my reviewed-by.
>>>
>>> Best regards,
>>> Krzysztof
>>>
>>>
>>> The following changes since commit 1c4c7159ed2468f3ac4ce5a7f08d79663d381a93:
>>>
>>>   Merge tag 'ext4_for_linus_stable' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4 (2015-
>>> 07-05 16:24:54 -0700)
>>>
>>> are available in the git repository at:
>>>
>>>
>>>   https://github.com/krzk/linux.git tags/samsung-mach-4.3
>>>
>>> for you to fetch changes up to 70f83b6716ea0e5944071c12ff1716f93a9c2d8d:
>>>
>>>   cpufreq: exynos: remove Exynos5250 specific cpufreq driver support (2015-07-16 10:39:56 +0900)
>>>
>>> ----------------------------------------------------------------
>>> Improvements for Exynos based boards:
>>> 1. Switch to generic cpufreq-dt driver for Exynos5250. The old driver
>>>    is removed.
>>> 2. Fix memory leak in cpufreq error path.
>>> 3. Cleanups: remove duplicated define with bootloader's sleep magic
>>>    constant, staticize local function, drop 'owner' from
>>>    platform driver, fix cast of iomem to ERR_PTR.
>>>
>>> ----------------------------------------------------------------
>>> Bartlomiej Zolnierkiewicz (1):
>>>       cpufreq: exynos: remove Exynos5250 specific cpufreq driver support
>>>
>>> Krzysztof Kozlowski (4):
>>>       ARM: EXYNOS: pmu: Make local function static
>>>       ARM: EXYNOS: Remove duplicated define of SLEEP_MAGIC
>>>       ARM: EXYNOS: pmu: Drop owner assignment
>>>       ARM: EXYNOS: Use IOMEM_ERR_PTR when function returns iomem
>>>
>>> Shailendra Verma (1):
>>>       cpufreq: exynos: Fix for memory leak in case SOC name does not match
>>>
>>> Thomas Abraham (3):
>>>       clk: samsung: exynos5250: add cpu clock configuration data and instantiate cpu clock
>>>       ARM: dts: Exynos5250: add CPU OPP and regulator supply property
>>>       ARM: Exynos: switch to using generic cpufreq driver for Exynos5250
>>>
>>>  arch/arm/boot/dts/exynos5250-arndale.dts  |   4 +
>>>  arch/arm/boot/dts/exynos5250-smdk5250.dts |   4 +
>>>  arch/arm/boot/dts/exynos5250-snow.dts     |   4 +
>>>  arch/arm/boot/dts/exynos5250-spring.dts   |   4 +
>>>  arch/arm/boot/dts/exynos5250.dtsi         |  22 ++++
>>>  arch/arm/mach-exynos/common.h             |   6 +
>>>  arch/arm/mach-exynos/exynos.c             |   1 +
>>>  arch/arm/mach-exynos/firmware.c           |   2 -
>>>  arch/arm/mach-exynos/platsmp.c            |   2 +-
>>>  arch/arm/mach-exynos/pmu.c                |   3 +-
>>>  arch/arm/mach-exynos/suspend.c            |   4 +-
>>>  drivers/clk/samsung/clk-exynos5250.c      |  31 +++++
>>>  drivers/cpufreq/Kconfig.arm               |  11 --
>>>  drivers/cpufreq/Makefile                  |   1 -
>>>  drivers/cpufreq/exynos-cpufreq.c          |   9 +-
>>>  drivers/cpufreq/exynos-cpufreq.h          |  17 ---
>>>  drivers/cpufreq/exynos5250-cpufreq.c      | 210 ------------------------------
>>>  include/dt-bindings/clock/exynos5250.h    |   1 +
>>>  18 files changed, 84 insertions(+), 252 deletions(-)
>>>  delete mode 100644 drivers/cpufreq/exynos5250-cpufreq.c
>>> --
>>
>> Applied above changes into fixes/non-critical, next/cleanup-samsung,
>> next/dt-samsung and next/cpufreq-clk-samsung according to the change.

Cc-ed Bartlomiej,

One issue found: splitting DTS change for Exynos 5250 cpufreq to
separate branch will break bisectability. The commit "ARM: dts:
Exynos5250: add CPU OPP and regulator supply property":
1. MUST be put after "clk: samsung: exynos5250: add cpu clock
configuration data and instantiate cpu clock" to prevent build
failures,
2. should be put before "ARM: Exynos: switch to using generic cpufreq
driver for Exynos5250" to prevent lost cpufreq functionality.

Doing otherwise would lose bisectability which is really unfortunate
when you can simply avoid it. This should remain in the same branch -
next/cpufreq-clk-samsung.

Best regards,
Krzysztof
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