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93224edf0b
This adds a driver that supports the GPIO block found in MStar/SigmaStar ARMv7 SoCs. The controller seems to have enough register for 128 lines but where they are wired up differs between chips and no currently known chip uses anywhere near 128 lines so there needs to be some per-chip data to collect together what lines actually have physical pins attached and map the right names to them. The core peripherals seem to use the same lines on the currently known chips but the lines used for the sensor interface, lcd controller etc pins seem to be totally different between the infinity and mercury chips The code tries to collect all of the re-usable names, offsets etc together so that it's easy to build the extra per-chip data for other chips in the future. So far this only supports the MSC313 and MSC313E chips. Support for the SSC8336N (mercury5) is trivial to add once all of the lines have been mapped out. Signed-off-by: Daniel Palmer <daniel@0x0f.com> Link: https://lore.kernel.org/r/20201129110803.2461700-4-daniel@0x0f.com Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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.