intelli_plug: intelligent hotplug cpu driver with eco mode

Signed-off-by: Paul Reioux <reioux@gmail.com>
intelli_plug: tweak for faster wakeup from suspend

bump version to 1.1

Signed-off-by: faux123 <reioux@gmail.com>
intelli_plug: increase cores on persistence

also replace hardcoded values with Macros for ease of updating later

Signed-off-by: faux123 <reioux@gmail.com>
intelli_plug: make it gcc-4.6.x eabi compatible :p

Signed-off-by: faux123 <reioux@gmail.com>
ARM: 7583/1: decompressor: Enable unaligned memory access for v6 and above

Modern GCC can generate code which makes use of the CPU's native
unaligned memory access capabilities.  This is useful for the C
decompressor implementations used for unpacking compressed kernels.

This patch disables alignment faults and enables the v6 unaligned
access model on CPUs which support these features (i.e., v6 and
later), allowing full unaligned access support for C code in the
decompressor.

The decompressor C code must not be built to assume that unaligned
access works if support for v5 or older platforms is included in
the kernel.

For correct code generation, C decompressor code must always use
the get_unaligned and put_unaligned accessors when dealing with
unaligned pointers, regardless of this patch.

Signed-off-by: Dave Martin <dave.martin@linaro.org>
Acked-by: Nicolas Pitre <nico@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
arch/arm/Kconfig: enable unaligned capability for ARM

Signed-off-by: faux123 <reioux@gmail.com>
switch the protection of percpu_counter list to spinlock

... making percpu_counter_destroy() non-blocking

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
intelli_plug: use rq_stats to help detect artificial or constant loads

benchmarks often create fake / artificial loads at a constant rate.  These
type of loads are not detected corectly by run average algorithms. Use
the run queue stats to help detect these cases and bring up the cores in
correspondence.

bump version to 1.2

Signed-off-by: faux123 <reioux@gmail.com>
intelli_plug: use mp_decision() algorithm for core 3 and 4

This replaces the simplistic check for run queue thresholds with a more
sophisticate algorithm with time awareness

bump version to 1.3

Signed-off-by: faux123 <reioux@gmail.com>
intelli_plug: tweak mp_decsion parameters and remove unused logic

Signed-off-by: faux123 <reioux@gmail.com>
intelli_plug: bump threshold slightly for better response

Signed-off-by: faux123 <reioux@gmail.com>
wip: intelli_plug: change logic for better benchmark performance

Signed-off-by: faux123 <reioux@gmail.com>
intelli_plug: use mp_decision to reduce online persistence count for cores

this should bring down the cores faster when run queue is low
also optimized code a bit using local vars

Signed-off-by: faux123 <reioux@gmail.com>
intelli_plug: disable by default

let the user enable via sysfs so it won't clash with mpdecision which is
enabled by default for qualcomm phones

Signed-off-by: faux123 <reioux@gmail.com>
intelli_plug: slow down hotplug activity from 50ms to 200ms

this will reduce the hotplug chaos which may in turn save more power

Signed-off-by: faux123 <reioux@gmail.com>

Conflicts:
	arch/arm/mach-msm/intelli_plug.c
intelli_plug: code clean up and minor bug fixes

bump to version 1.6

Signed-off-by: Paul Reioux <reioux@gmail.com>
intelliplug: replaced deprecated early_suspend driver with userspace interface

early_suspend has been deprecated, so move original functionality to sysfs
interfae and have userspace app to replicate the early_suspend functionality

bump version to 1.7

Signed-off-by: Paul Reioux <reioux@gmail.com>
intelli_plug: add dynamic load sampling rate logic

Add dynamic sampling logic based on load. If load is high and required more
than 2 cores, increase the sampling rate for a duration of 3 seconds to help
manage the load better during this time.  Once duration expires, revert back
to lazier sampling rate for better batter performance.

Signed-off-by: Paul Reioux <reioux@gmail.com>
intelli_plug: add new power_suspend PM driver

bump version to 1.9

Signed-off-by: Paul Reioux <reioux@gmail.com>
cpufreq/cpufreq_intellidemand: intellidemand cpufreq
 governor (version 4.0)

Intellidemand is inspired by ondemand governor. Its main features are:

 - auto cpu hotplugging based on runnable thread average calculations
 - detection of browsing mode (long screen on activities with moderate run
   queue depth =< 45 )
 - limit max frequencies when in browsing mode to conserve battery for long
   duration tasks

Browsing State Determination:
 1- Browsing state is enabled as power-on default. Browsing state is disabled
    when run queue depth is > 45 (very high instantaneous spikes)

Browsing State Limit Max Freq Logic (sliding window algorithm):
 1- While Screen is ON > 3 min, and average load of the CPU is < 35%, then
    CPU Max frequencies will remain power-on default
 2- While Screen is On, if average CPU load > 35%, both CPUs max frequencies
    will be limited to a lower user configurable max value
 3- While Screen is On, After both CPUs' Max is limited to lowered max, when
    the average CPU load has dropped down to less than < 25%, then both CPUs
    Max freq will be restored to back to power-on default

Runnable Thread Auto-hotplug (fast hotplug / slow unplug algorithm):
 1- When average number of running thread is < threshold, 2nd cpu will be
    unplugged.
 2- When > threshold, 2nd cpu will be hotplugged.
 3- The logic applies a fast hotplug and slow unplug algorithm so 2nd core
    will stay enabled longer to help deal with performance spikes

changes from Ver 2.0 -> Ver 3.0:
  - remove GPU Busy dependency for browsing state detection (this will make
    the governor more portable to other platforms without specific GPU
    architecture knowledge)

dependencies:
  -- Qualcomm's run queue average logic (SOC independent logic)
  -- TI's runnable thread average logic (SOC independent logic)

forward ported to Linux 3.4 for use on S-800

Signed-off-by: Paul Reioux <reioux@gmail.com>