[PATCH v2 00/12] Samsung PM consolidation part 2 (multiplatform)

[Tomasz Figa]

Current Samsung PM code is heavily unprepared for multiplatform systems.
The design implies accessing functions and global variables defined in
particular mach- subdirectory from common code in plat-, which is not
allowed when building ARCH_MULTIPLATFORM. In addition there is a lot of
forced code unification, which makes common function handle any possible
quirks of all supported SoCs. In the end this design turned out to not
work too well, ending with a lot of empty functions exported from mach-,
just because code in common pm.c calls them. Moreover, recent trend of
moving lower level suspend/resume code to proper drivers, like pinctrl
or clk, made a lot of code there redundant, especially on DT-only platforms
like Exynos.

This patch series attempts to untie Exynos PM support from the legacy
Samsung PM core and make it multiplatform-aware, by isolating truly
generic parts of the latter, making them multiplatform-friendly and then
reimplementing Exynos PM support in a multiplatform-capable way by using
those generic parts. The result is that now PM initialization is started
from mach-exynos*-dt, which calls Exynos-specific initialization code that
registers platform_suspend_ops, so control flow is basically reversed
ending with mach- code calling more generic plat- code if needed.

This is limited to Exynos right now, but remaining SoCs could follow
in further series.

Depends on Samsung PM consolidation part 1 (clocks) series:
 - http://thread.gmane.org/gmane.linux.kernel.samsung-soc/26816

On Exynos4210-based Trats, Exynos4412-based Trats2 and Exynos5250-based
Arndale boards (except suspend/resume, which is broken because of
unrelated reasons):

Tested-by: Tomasz Figa <t.figa at samsung.com>

Changes since v1 (RFC):
 - fixed l2x0 resume,
 - fixed checkpatch complaints (about issues in existing code being moved),
 - rebased on top of current linux-next,
 - slightly reordered patches to make the order more logical.

Tomasz Figa (12):
  ARM: EXYNOS: Do not resume l2x0 if not enabled before suspend
  ARM: SAMSUNG: Add soc_is_s3c2410() helper
  ARM: SAMSUNG: pm: Save UART DIVSLOT register based on SoC type
  ARM: SAMSUNG: pm: Use debug_ll_addr() to get UART base address
  ARM: SAMSUNG: pm: Consolidate PM debug functions
  ARM: SAMSUNG: pm: Move Samsung PM debug code into separate file
  ARM: SAMSUNG: Move common save/restore helpers to separate file
  ARM: SAMSUNG: pm: Move s3c_pm_check_* prototypes to plat/pm-common.h
  ARM: EXYNOS: Kconfig: Fix abuse of CONFIG_PM
  ARM: EXYNOS: Remove PM initcalls and useless indirection
  ARM: EXYNOS: Stop using legacy Samsung PM code
  ARM: exynos: Allow wake-up using GIC interrupts

 arch/arm/mach-exynos/Kconfig                   |  16 +--
 arch/arm/mach-exynos/Makefile                  |   2 +-
 arch/arm/mach-exynos/common.c                  |   1 +
 arch/arm/mach-exynos/common.h                  |  14 ++
 arch/arm/mach-exynos/include/mach/pm-core.h    |  75 -----------
 arch/arm/mach-exynos/pm.c                      | 172 +++++++++++++++++++------
 arch/arm/mach-exynos/regs-pmu.h                |   2 +
 arch/arm/mach-exynos/sleep.S                   |  85 ++++++++++++
 arch/arm/mach-s3c64xx/pm.c                     |   1 -
 arch/arm/mach-s5p64x0/pm.c                     |   1 -
 arch/arm/plat-samsung/Makefile                 |   2 +
 arch/arm/plat-samsung/include/plat/cpu.h       |   6 +
 arch/arm/plat-samsung/include/plat/pm-common.h | 110 ++++++++++++++++
 arch/arm/plat-samsung/include/plat/pm.h        |  80 +-----------
 arch/arm/plat-samsung/pm-check.c               |   2 +-
 arch/arm/plat-samsung/pm-common.c              |  75 +++++++++++
 arch/arm/plat-samsung/pm-debug.c               |  98 ++++++++++++++
 arch/arm/plat-samsung/pm.c                     | 146 ---------------------
 arch/arm/plat-samsung/s5p-sleep.S              |  43 -------
 19 files changed, 531 insertions(+), 400 deletions(-)
 delete mode 100644 arch/arm/mach-exynos/include/mach/pm-core.h
 create mode 100644 arch/arm/mach-exynos/sleep.S
 create mode 100644 arch/arm/plat-samsung/include/plat/pm-common.h
 create mode 100644 arch/arm/plat-samsung/pm-common.c
 create mode 100644 arch/arm/plat-samsung/pm-debug.c

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1.8.5.2