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c20e9e7675
The V3s/V3 has a NMI interrupt controller, mainly used for the AXP209. Its address follows the system controller block, which was previously incorrectly described as spanning over 0x1000 address bytes. Even though this is what the Allwinner documentation indicates, precedence from other SoCs such as the R40 suggests that this is not actually the case. This reduces the system controller address span up to the NMI controller and adds a node for the controller, with its dedicated compatible. While the interrupt number was found in Allwinner's documentation, the address for the controller is specified in any Allwinner SDK supporting sun8iw8 (V3/V3s) at: drivers/power/axp_power/axp20/axp20-board.c It was tested to work on a V3 board with an AXP209 connected to the NMI interrupt line. Signed-off-by: Paul Kocialkowski <contact@paulk.fr> Signed-off-by: Maxime Ripard <maxime@cerno.tech> Link: https://lore.kernel.org/r/20201206165131.1041983-3-contact@paulk.fr
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
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.