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The Allwinner R40 SoC is marketed as the successor to the A20 SoC. The R40 is a smaller chip than the A20, but features the same set of programmable pins, with a couple extra pins and some new pin functions. The chip features 4 Cortex-A7 cores and a Mali-400 MP2 GPU. It retains most if not all features from the A20, while adding some new features, such as MIPI DSI output, or updating various hardware blocks, such as DE 2.0. Signed-off-by: Chen-Yu Tsai <wens@csie.org> Signed-off-by: Icenowy Zheng <icenowy@aosc.io> Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
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.