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Added support for emc frequencies 75,100,25 Mhz scaling
Change-Id: Id5f170a380c3acbc7a375ab5e5018628549b992f
Reviewed-on: http://git-master/r/18340
Reviewed-by: Amit Kamath <akamath@nvidia.com>
Tested-by: Amit Kamath <akamath@nvidia.com>
Reviewed-by: Bharat Nihalani <bnihalani@nvidia.com>
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Define cpu frequency tables for different tegra2 CPU clock ranges,
and add matching selection mechanism for scaling table as well as
throttling limits.
Change-Id: I06b13f150d72f8a80f879ecf80ed44cc1f63bad4
Reviewed-on: http://git-master/r/16076
Reviewed-by: Aleksandr Frid <afrid@nvidia.com>
Tested-by: Aleksandr Frid <afrid@nvidia.com>
Reviewed-by: Bharat Nihalani <bnihalani@nvidia.com>
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The localtimer code will use a cpufreq notifier to update
the prescalers.
Change-Id: Ie0587d7eaec628ff11bf40636f78597574cd63ec
Signed-off-by: Colin Cross <ccross@android.com>
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Various review feedback, including:
Keep a global throttling index that specifies a ceiling CPU speed, lowered by one
at each delay interval (while the temperature alarm continues to be signalled).
Avoid lowering the throttle too far based on a transitory lowering of speed
requested by the governor.
Restore governor-requested speed when throttling turned off.
Add cpufreq sysfs attribute for checking throttling state.
Make throttling workqueue high-priority.
Cosmetic changes.
Change-Id: I068bf32115927fa61282f17f4a8798f2aee0b530
Signed-off-by: Todd Poynor <toddpoynor@google.com>
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The NCT1008 driver is now passed a function pointer from the board
file's platform data to be called when alarms are asserted or
deasserted. Switch to a single function for throttling
enable/disable suitable for calling via the temperature alarm
callback.
Change-Id: Ic0eb1566a68e151216e26dfb6ed6f4bc7a273ddb
Signed-off-by: Todd Poynor <toddpoynor@google.com>
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Based on work by Dmitriy Gruzman and Varun Wadekar.
Change-Id: I64d765628223b7ef1ec493b9e409ea11e9391b94
Signed-off-by: Todd Poynor <toddpoynor@google.com>
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Change-Id: I08c64f64a12bcb11e7c0e466fa77fe971e4b2cba
Signed-off-by: Colin Cross <ccross@android.com>
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Change-Id: I28d69d22437b6ba2d22e4ce12746630786006071
Signed-off-by: Dmitriy Gruzman <dmitriy.gruzman@motorola.com>
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Change-Id: Id678df6299adfc23a4321ddaff10b4c64a4ed895
Signed-off-by: Colin Cross <ccross@android.com>
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Change-Id: I97614cac27da66a95664664143952f376fc5462e
Signed-off-by: Colin Cross <ccross@android.com>
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Change-Id: I8d187b861e18dfefcbf4566f4c695dfd1e17fe98
Signed-off-by: Colin Cross <ccross@google.com>
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Adds a SUSPEND_PREPARE notification hook to drop the frequency to
the lowest possible during suspend. This prevents the cpufreq driver
from attempting regulator calls after suspend has started - the
regulator api can call into drivers that have already been suspended.
Also adds 216MHz (off of PLLP) as the lowest CPU frequency, which
allows PLLX to be turned off.
Change-Id: I46a7f88610ce35b6f761a557905861f79bc4df0b
Signed-off-by: Colin Cross <ccross@google.com>
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Implement cpufreq support for the Tegra SOC. DVFS is handled by the
core virtual cpu clock. The frequencies of the two cores are tied
together, the highest frequency requested by either core determines
the actual frequency.
Signed-off-by: Colin Cross <ccross@android.com>
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