[PATCH v2 00/18] ARM: OMAP5: PM: Add MPUSS suspend and CPUidle support

[Santosh Shilimkar]

Kevin,

Here is the refreshed version(v2) of the OMAP5 PM suspport which was posted
earlier (March 1st 2013). Patch-set incorporates comments from Nishant
Menon (Thanks for review NM) and his acked-by tags. I would like to get this
queued for 3.10 merge window if you are ok with the series.

Series is built on top of my pull requests [1] [2] [3] sent to Tony and your
'for_3.10/pm/cleanup' branch. For testing, I have created a branch [4]
which put together all the needed dependencies, fixes which should make it
to 3.10 merge window.

Series adds OMAP5 MPUSS power management support for system wide suspend
and CPUidle. Its heavy re-use from OMAP4 and hence only ~400 odd lines are
needed to add OMAP5 PM support on top of existing OMAP4 PM support.

OMAP5 adds a mercury retention feature which is an enhancement of
existing retention feature to reduce the leakage. No change in
programming model except one time enabling of mercury retention
during init.

One more notable change in OMAP5 vs OMAP4 devices, CPUx power domains
support retention state which lets you hit MPUSS and Core retention with
very low latency C-states.

Tested on OMAP4430 SDP, OMAP4460 Panda, OMAP5430 SDP and OMAP5432 Panda
devices with suspend and CPUIdle. Rootfs is mounted over ramdisk since
the mmc and nfs based fs needs DMA engine patches. For suspend wakeup,
I used Sourav's couple of serial wakeup wip patches from the lists.

The following changes since commit 9981cde24de52e5bb9a7cd918d1e54de241f85c9:

  Merge branch 'for_3.10/omap5_data_files' of git://git.kernel.org/pub/scm/linux/kernel/git/ssantosh/linux into for_3.10/omap5_pm (2013-03-25 12:29:34 +0530)

are available in the git repository at:


  git://git.kernel.org/pub/scm/linux/kernel/git/ssantosh/linux.git for_3.10/omap5_pm

for you to fetch changes up to 75bd846d3103da858a208fe07127151903d1f608:

  ARM: OMAP5: PM: handle device instance for warm reset (2013-03-25 12:37:44 +0530)

----------------------------------------------------------------
Nishanth Menon (1):
  ARM: OMAP5: PM: handle device instance for warm reset

Santosh Shilimkar (17):
  ARM: OMAP4+: PM: Consolidate MPU subsystem PM code for re-use
  ARM: OMAP5: PM: Update CPU context register offset
  ARM: OMAP4+: PM: Consolidate and use OMAP4 PM code for OMAP5
  ARM: OMAP5: PM: Set MPUSS-EMIF clock-domain static dependency
  ARM: OMAP5: PM: Enables ES2 PM mode by default
  ARM: OMAP5: PM: Enable Mercury retention mode on CPUx powerdomains
  ARM: OMAP5: Add init_late() hook to enable pm initialization
  ARM: OMAP5: PM: Add CPU power off in hotplug path
  ARM: OMAP4+: PM: Restore CPU power state to ON with clockdomain force
    wakeup method
  ARM: OMAP5: PM: Add MPU Open Switch Retention support
  ARM: OMAP5: PM: Add L2 memory power down support
  ARM: OMAP4: CPUidle: Avoid double idle driver registration
  ARM: OMAP: CPUidle: Unregister drivere on device registration failure
  ARM: OMAP4: CPUidle: Make C-state description field more precise
  ARM: OMAP4+: CPUidle: Consolidate idle driver for OMAP5 support
  ARM: OMAP4+: CPUidle: Deprecate use of
    omap4_mpuss_read_prev_context_state()
  ARM: OMAP4+: CPUidle: Add OMAP5 idle driver support

 arch/arm/mach-omap2/Kconfig                        |    1 +
 arch/arm/mach-omap2/Makefile                       |   12 +-
 arch/arm/mach-omap2/board-generic.c                |    1 +
 arch/arm/mach-omap2/common.h                       |    8 +-
 arch/arm/mach-omap2/cpuidle34xx.c                  |    6 +-
 .../{cpuidle44xx.c => cpuidle_omap4plus.c}         |  151 ++++++++++++++++---
 arch/arm/mach-omap2/io.c                           |    8 +
 arch/arm/mach-omap2/omap-mpuss-lowpower.c          |  155 +++++++++++++++-----
 arch/arm/mach-omap2/omap-secure.h                  |    9 ++
 arch/arm/mach-omap2/omap-smp.c                     |   12 +-
 arch/arm/mach-omap2/omap-wakeupgen.c               |   30 +++-
 arch/arm/mach-omap2/omap-wakeupgen.h               |    1 +
 arch/arm/mach-omap2/omap4-sar-layout.h             |    2 +
 arch/arm/mach-omap2/{pm44xx.c => pm_omap4plus.c}   |   90 ++++++++++--
 arch/arm/mach-omap2/prminst44xx.c                  |   10 +-
 .../mach-omap2/{sleep44xx.S => sleep_omap4plus.S}  |  106 +++++++++++++
 16 files changed, 512 insertions(+), 90 deletions(-)
 rename arch/arm/mach-omap2/{cpuidle44xx.c => cpuidle_omap4plus.c} (58%)
 rename arch/arm/mach-omap2/{pm44xx.c => pm_omap4plus.c} (74%)
 rename arch/arm/mach-omap2/{sleep44xx.S => sleep_omap4plus.S} (77%)

-- 

Regards,
Santosh

[1] http://www.spinics.net/lists/arm-kernel/msg231512.html
[2] http://www.spinics.net/lists/arm-kernel/msg231513.html
[3] http://www.spinics.net/lists/arm-kernel/msg231514.html
[4] git://git.kernel.org/pub/scm/linux/kernel/git/ssantosh/linux.git testing/3.10/omap5_int