[PATCH v2 00/10] ARM: Exynos: PMU cleanup and refactoring for using DT

[Pankaj Dubey]

This patch series, does some minor cleanup and modifies Exynos PMU related
code for mapping and initialization of Exynos Power Management Unit (PMU)
base address from device tree. This is also preparation for moving PMU
related code out of machine folder and moving into a "drivers/mfd", so that
ARM64 based SoC can utilize common piece of code. These patches require change
in Exynos4210, Exynos4212 and Exynos4412 dtsi files, which has been posted
as separate patch series [2]

These patches are created on top of Kukjin Kim's for-next (v3.15-rc1 tag)
branch.

These patches depends on following two patch series:
1) mfd: syscon: Support early initialization
   https://lkml.org/lkml/2014/4/8/239
2) Add PMU node for Exynos SoCs
   http://www.mail-archive.com/linux-samsung-soc@xxxxxxxxxxxxxxx/msg29329.html

We have tested these patches on SMDK5250 and Arndale (Exynos5250) boards for
System boot and PMU initialization and S2R.

For testing on Arndale (Exynos5250) board:
Tested-by: Pankaj Dubey <pankaj.dubey@xxxxxxxxxxx>

Changes Since v1:
 - Rebased on latest for-next of Kukjin Kim's tree.
 - Added patch: "Make exynos machine_ops as static". 
	For making more cleanup in "mach-exynos/common.h"
	as suggested by Tomasz Figa.
 - Addressed comments of Tomasz Figa for cleaning "mach-exynos/common.h".
 - Updated patch: Remove file path from comment section
	As suggested by Michel Simek, instead of updating file path
	lets remove them from each file under "mach-exynos".
	Even though Kukjin pointed out that there is similar patch pending from
	Sachin/Tushar but since I could not find I have included this here. If
	I have missed something please point to any existing such patch.
 - Updated patch: Add support for mapping PMU base address via DT
	- Removed __initdata from declaration of "exynos_pmu_base", as it caused
	kernel crash as pointed out by Vikas Sajjan.
	- Added support for Syscon initialization and getting PMU regmap handle
	as suggested by Sylwester. Since current implementation of early
	intialization [1] has limitation that "early_syscon_init" requires
	DT to be unflattened and system should be able to allocate memory,
	we can't use regmap handles for platsmp.c file as "smp_secondary_init"
	will be called before DT unflattening. So I have kept both method for
	accessing PMU base address. platsmp.c will use ioremmaped address where
	as rest other files can use regmap handle.
 - Added patch: Remove "linux/bug.h" from pmu.c.
 - Updated patch: Refactored code for PMU register mapping via DT
	- Modified to use regmap_read/write when using regmap handle.
 - Added patch: Move "mach/map.h" inclusion from regs-pmu.h to platsmp.c
 - Added patch: Add device tree based initialization support for PMU.
	- Convert existing PMU implementation to be a device tree based 
	 before moving it to "drivers/mfd" folder. As suggested by Bartlomiej.
	- Dropped making a platform_driver for PMU, as currently PMU binding
	has two compatibility strings as "samsung, exynosxxx-pmu", "syscon",
	once we	enable MFD_SYSCON config option, current "syscon" driver probe
	gets called and PMU probe never gets called. So modified PMU
	initialization code to scan DT and match against supported compatiblity
	string in driver code, and once we get matching node use that for
	accessing PMU regmap handle using "syscon_early_regmap_lookup_by_phandle".
	If there is any better solution please suggest.

Pankaj Dubey (6):
  ARM: EXYNOS: Make exynos machine_ops as static
  ARM: EXYNOS: Cleanup "mach-exynos/common.h" file
  ARM: EXYNOS: Remove file path from comment section
  ARM: EXYNOS: Refactored code for using PMU address via DT
  ARM: EXYNOS: Move "mach/map.h" inclusion from regs-pmu.h to platsmp.c
  ARM: EXYNOS: Add device tree based initialization support for PMU.

Young-Gun Jang (4):
  ARM: EXYNOS: Move SYSREG definition into sys-reg specific file.
  ARM: EXYNOS: Remove regs-pmu.h header dependency from pm_domain
  ARM: EXYNOS: Add support for mapping PMU base address via DT
  ARM: EXYNOS: Remove "linux/bug.h" from pmu.c

 arch/arm/mach-exynos/Kconfig               |    2 +
 arch/arm/mach-exynos/common.h              |   13 +-
 arch/arm/mach-exynos/cpuidle.c             |   37 +-
 arch/arm/mach-exynos/exynos.c              |  104 +++++-
 arch/arm/mach-exynos/headsmp.S             |    2 -
 arch/arm/mach-exynos/hotplug.c             |    7 +-
 arch/arm/mach-exynos/include/mach/map.h    |    3 -
 arch/arm/mach-exynos/include/mach/memory.h |    3 +-
 arch/arm/mach-exynos/platsmp.c             |   17 +-
 arch/arm/mach-exynos/pm.c                  |   61 ++--
 arch/arm/mach-exynos/pm_domains.c          |    2 +-
 arch/arm/mach-exynos/pmu.c                 |  191 ++++++++---
 arch/arm/mach-exynos/regs-pmu.h            |  512 ++++++++++++++--------------
 arch/arm/mach-exynos/regs-sys.h            |   22 ++
 14 files changed, 585 insertions(+), 391 deletions(-)
 create mode 100644 arch/arm/mach-exynos/regs-sys.h

-- 
1.7.10.4

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