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[ Upstream commitcf9ae4a007] In pre-production prototypes (of which I only know one person having one, Peter Geis), GPIO0 pin A5 was tied to the SDMMC power enable pin on the CM4 connector. On all production models, this is not the case; instead, this pin is used for the nEXTRST signal, and the SDMMC power enable pin is always pulled high. Since everyone currently using the SOQuartz device trees will want this change, it is made to the tree without splitting the trees into two separate ones of which users will then inevitably choose the wrong one. This fixes USB and PCIe on a wide variety of CM4IO-compatible boards which use the nEXTRST signal. Fixes:5859b5a9c3("arm64: dts: rockchip: add SoQuartz CM4IO dts") Signed-off-by: Nicolas Frattaroli <frattaroli.nicolas@gmail.com> Link: https://lore.kernel.org/r/20230421152610.21688-1-frattaroli.nicolas@gmail.com Signed-off-by: Heiko Stuebner <heiko@sntech.de> Signed-off-by: Sasha Levin <sashal@kernel.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.