[PATCHv2 00/11] Unify arm_generic and arch_timer drivers

[Mark Rutland]

This is an updated version the series I posted a few weeks ago [1].

Changes since v1:
* Rename arch_counter_{enable=>set}_user_access.
* Explicitly disable access to counters from userspace on arm.
* Add device_node refcounting fix.
* Fix conflict with Will Deacon's AArch64 vdso changes.
* Simplify the cpu notifier.
* Fix a couple of style issues.

Currently we have two drivers for the ARM generic / architected timer,
arch_timer in arch/arm, and arm_generic in drivers/clocksource. This is
an unnecessary duplication of code, and will only lead to maintenance
headaches later.

This patch series splits the generic portion of the arch_timer out to
drivers/clocksource, and ports the arm64 code to use it. The now unused
arm_generic driver is removed in the process.

Separating the arch_timer driver from the arm-specific local_timer api
currently loses us broadcast timer support. I've posted another series
[2] which attempts to remedy this by decoupling the timer broadcast
mechanism from drivers.

Due to the unfortunate timing of the merge window and the dependence on
Will's vdso changes in mainline since v3.7, I've based this on today's
upstream HEAD (752451f0). I'll repost the series in January rebased onto
an -rc.

Thanks,
Mark.

[1] http://lists.infradead.org/pipermail/linux-arm-kernel/2012-November/135651.html
[2] http://lists.infradead.org/pipermail/linux-arm-kernel/2012-December/137929.html

Mark Rutland (11):
  arm: arch_timer: balance device_node refcounting
  arm: arch_timer: remove redundant available check
  arm: arch_timer: use u64/u32 for register data
  arm: arch_timer: standardise counter reading
  arm: arch_timer: split cntfrq accessor
  arm: arch_timer: factor out register accessors
  arm: arch_timer: divorce from local_timer api
  arm: arch_timer: add arch_counter_set_user_access
  arm: arch_timer: move core to drivers/clocksource
  arm64: move from arm_generic to arm_arch_timer
  Documentation: Add ARMv8 to arch_timer devicetree

 .../devicetree/bindings/arm/arch_timer.txt         |    7 +-
 arch/arm/Kconfig                                   |    3 +-
 arch/arm/include/asm/arch_timer.h                  |  111 ++++-
 arch/arm/kernel/arch_timer.c                       |  504 +-------------------
 arch/arm/mach-omap2/Kconfig                        |    2 +-
 arch/arm64/Kconfig                                 |    1 +
 arch/arm64/include/asm/arch_timer.h                |  133 +++++
 arch/arm64/include/asm/arm_generic.h               |  100 ----
 arch/arm64/kernel/time.c                           |   29 +-
 drivers/clocksource/Kconfig                        |    6 +-
 drivers/clocksource/Makefile                       |    2 +-
 drivers/clocksource/arm_arch_timer.c               |  375 +++++++++++++++
 drivers/clocksource/arm_generic.c                  |  232 ---------
 include/clocksource/arm_arch_timer.h               |   63 +++
 include/clocksource/arm_generic.h                  |   21 -
 15 files changed, 734 insertions(+), 855 deletions(-)
 create mode 100644 arch/arm64/include/asm/arch_timer.h
 delete mode 100644 arch/arm64/include/asm/arm_generic.h
 create mode 100644 drivers/clocksource/arm_arch_timer.c
 delete mode 100644 drivers/clocksource/arm_generic.c
 create mode 100644 include/clocksource/arm_arch_timer.h
 delete mode 100644 include/clocksource/arm_generic.h