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UDOO board has a possibility to disable most of imx6 SoC power supplies via "EN_5V" signal, which is connected to "NANDF_D4" pad. This reduces current consumption after shutdown from ~350 mA to ~40 mA and prevents a SoC watchdog from starting it again on its own after the watchdog timeout expires (previously it was not possible to shut down the SoC permanently if its watchdog was ever enabled since it was still ticking after the shutdown). Unfortunately, this does not extinguish the "Power" LED (as it is powered from an always-on voltage regulator). To power the SoC up again press the power button (SW2, the one with a long shaft). Signed-off-by: Maciej S. Szmigiero <mail@maciej.szmigiero.name> Signed-off-by: Shawn Guo <shawnguo@kernel.org>
Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. Please read the Documentation/process/changes.rst file, as it contains the requirements for building and running the kernel, and information about the problems which may result by upgrading your kernel.