[Code trace] power management (standby/suspend/resume) mechanism in Android & Linux

[INPUT MNGR]
frameworks/base/services/jni/com_android_server_InputManager.cpp
NativeInputManager::handleInterceptActions() :
dispatch keys to users or filter them as special event key like power control...

handleInterceptActions() callbacks to PowerManagerService goToSleep() for putting to sleep, to another function to wake it up, or passing keys to users

Code flow:
interceptKeyBeforeQueueing(), frameworks/base/services/jni/com_android_server_InputManager.cpp
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V
interceptKeyBeforeQueueing(), frameworks/base/policy/src/com/android/internal/policy/impl/PhoneWindowManager.java
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V
handleInterceptActions(), frameworks/base/services/jni/com_android_server_InputManager.cpp

[PWR MNGR CODE FLOW]
frameworks/base/core/java/android/os/PowerManager.java - API for APPS
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V
frameworks/base/services/java/com/android/server/PowerManagerService.java - core
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V
frameworks/base/core/java/android/os/Power.java - JNI


Reference links
http://blog.csdn.net/tommy_wxie/article/details/7208633
http://3y.uu456.com/bp-f823387031b76sce0s081439-1.html 

Very good illustration for the architecture of PM in Android
http://www.kandroid.org/online-pdk/guide/power_management.html

This is a very handy illustration on standby/wake framework from top to bottom
http://blog.csdn.net/lizhiguo0532/article/details/6453595

Tells different configuring opions for /sys/power/state
http://www.mjmwired.net/kernel/Documentation/power/states.txt