[PATCH v5 00/12] clk: exynos4: migrate to common clock framework

[Tomasz Figa]

Hi Thomas, Sylwester,

On Monday 21 of January 2013 15:29:16 Sylwester Nawrocki wrote:
> On 12/30/2012 01:33 AM, Thomas Abraham wrote:
> > Changes since v4:
> > - Rebased to linux-3.8-rc1.
> > 
> > Changes since v3:
> > - Includes changes suggested by Tomasz Figa <tomasz.figa at gmail.com>
> > 
> > This patch series migrates the Samsung Exynos4 SoC clock code to adopt
> > the common clock framework. The use of Samsung specific clock
> > structures has been removed and all board support code has been
> > updated. imx-style of clock registration and lookup has been adopted
> > for device tree based exynos4 platforms.
> > 
> > This patch series depends on this series:
> > http://www.mail-archive.com/linux-samsung-soc@vger.kernel.org/msg14471
> > .html and this patch
> > http://www.mail-archive.com/linux-samsung-soc@vger.kernel.org/msg14472
> > .html> 
> > Thomas Abraham (12):
> >   clk: samsung: add common clock framework helper functions for
> >   Samsung platforms clk: samsung: add pll clock registration helper
> >   functions
> >   clk: exynos4: register clocks using common clock framework
> >   ARM: Exynos: Rework timer initialization sequence
> >   ARM: Exynos4: Migrate clock support to common clock framework
> >   ARM: dts: add exynos4 clock controller nodes
> >   ARM: dts: add xxti and xusbxti fixed rate clock nodes for exynos4
> >   based platforms ARM: Exynos4: allow legacy board support to specify
> >   xxti and xusbxti clock speed ARM: dts: add clock provider
> >   information for all controllers in Exynos4 SoC ARM: Exynos4: remove
> >   auxdata table from machine file
> >   ARM: Exynos: use fin_pll clock as the tick clock source for mct
> >   ARM: Exynos: add support for mct clock setup
> >  
> >  .../devicetree/bindings/clock/exynos4-clock.txt    |  215 +++++++
> >  arch/arm/boot/dts/exynos4.dtsi                     |   50 ++
> >  arch/arm/boot/dts/exynos4210-origen.dts            |   12 +
> >  arch/arm/boot/dts/exynos4210-smdkv310.dts          |   12 +
> >  arch/arm/boot/dts/exynos4210.dtsi                  |    6 +
> >  arch/arm/boot/dts/exynos4412-origen.dts            |   12 +
> >  arch/arm/boot/dts/exynos4412-smdk4412.dts          |   12 +
> >  arch/arm/boot/dts/exynos4x12.dtsi                  |    6 +
> >  arch/arm/mach-exynos/Kconfig                       |    1 +
> >  arch/arm/mach-exynos/Makefile                      |    3 -
> >  arch/arm/mach-exynos/clock-exynos4.h               |   35 -
> >  arch/arm/mach-exynos/clock-exynos4210.c            |  188 ------
> >  arch/arm/mach-exynos/clock-exynos4212.c            |  192 ------
> >  arch/arm/mach-exynos/common.c                      |   57 ++-
> >  arch/arm/mach-exynos/common.h                      |   21 +-
> >  arch/arm/mach-exynos/mach-armlex4210.c             |    3 +-
> >  arch/arm/mach-exynos/mach-exynos4-dt.c             |   72 +--
> >  arch/arm/mach-exynos/mach-exynos5-dt.c             |    2 +-
> >  arch/arm/mach-exynos/mach-nuri.c                   |    5 +-
> >  arch/arm/mach-exynos/mach-origen.c                 |    5 +-
> >  arch/arm/mach-exynos/mach-smdk4x12.c               |    5 +-
> >  arch/arm/mach-exynos/mach-smdkv310.c               |    7 +-
> >  arch/arm/mach-exynos/mach-universal_c210.c         |    3 +-
> >  arch/arm/mach-exynos/mct.c                         |   32 +-
> >  arch/arm/plat-samsung/Kconfig                      |    4 +-
> >  drivers/clk/Makefile                               |    1 +
> >  drivers/clk/samsung/Makefile                       |    6 +
> >  drivers/clk/samsung/clk-exynos4.c                  |  655
> >  ++++++++++++++++++++ drivers/clk/samsung/clk-pll.c                  
> >     |  400 ++++++++++++ drivers/clk/samsung/clk-pll.h                
> >       |   38 ++
> >  drivers/clk/samsung/clk.c                          |  180 ++++++
> >  drivers/clk/samsung/clk.h                          |  216 +++++++
> >  32 files changed, 1919 insertions(+), 537 deletions(-)
> >  create mode 100644
> >  Documentation/devicetree/bindings/clock/exynos4-clock.txt delete
> >  mode 100644 arch/arm/mach-exynos/clock-exynos4.h
> >  delete mode 100644 arch/arm/mach-exynos/clock-exynos4210.c
> >  delete mode 100644 arch/arm/mach-exynos/clock-exynos4212.c
> >  create mode 100644 drivers/clk/samsung/Makefile
> >  create mode 100644 drivers/clk/samsung/clk-exynos4.c
> >  create mode 100644 drivers/clk/samsung/clk-pll.c
> >  create mode 100644 drivers/clk/samsung/clk-pll.h
> >  create mode 100644 drivers/clk/samsung/clk.c
> >  create mode 100644 drivers/clk/samsung/clk.h
> 
> Thanks Thomas! The patch series generally looks good to me, I've tested
> it on an Exynos4412 based board. I have applied couple fixes that Tomasz
> Figa has sent you off the mailing list. And to make a MIPI-CSI2 camera
> working a small fixup patch as below.
> 
> I have just one remark, but this could possibly be done as a follow up
> patch. Namely it may make sense to rename various sclk_* clocks to just
> "sclk", so for instance we don't have "fimd", "sclk_fimd", "fimc",
> "sclk_fimc" but e.g. "bus" or "gate" and "sclk" for each device. Such
> naming might be better for handling devices at core subsystems level,
> e.g. Runtime PM or devfreq.
> 
> Please feel free to add:
> 
> Reviewed-by: Sylwester Nawrocki <s.nawrocki at samsung.com>
> Tested-by: Sylwester Nawrocki <s.nawrocki at samsung.com>

I fully agree with Sylwester. After adding mentioned fixup patches, feel 
free to add my Reviewed-by and Tested-by as well.

> 
> I would be great to have this patch set merged for 3.9, so people can
> switch earlier to the common clock API, rather than modifying files
> that will be removed soon.

Yes, it would be great to have this series merged earlier, because it's 
very important for further development of Device Tree support on Samsung 
platforms. Possibly for 3.9 it could be merged as an alternative to the 
legacy clock code and after enough testing legacy code could be dropped in 
next kernel release.

Best regards
-- 
Tomasz Figa
Samsung Poland R&D Center
SW Solution Development, Linux Platform