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The cru node references undocumented compatibles of "rockchip,cru" and also marks it as syscon. A general rockchip,cru is way too generic to ever be used anywhere, so needs to go away, similarly the cru should not be written to from other places, instead regular clock routines should be used. Both mainline Linux as well as the vendor-kernel up to their 6.1 branch only reference the cru via the normal assigned-clocks, clocks and resets properties and do not get a syscon from the node. Similarly, there is no syscon access by compatible both in mainline nor the vendor-kernel up to their 6.1 branch, through either the rockchip,rk3328-cru nor rockchip,cru compatibles. So these two really are unused in all publically visible places. Sidenote: the vendor-kernel does pretty crazy stuff in the camera interface and tdm driver, where they map the cru separately and set clock muxes and gates directly. This should of course never reach mainline anyway. Signed-off-by: Johan Jonker <jbx6244@gmail.com> [update commit message, to explain the unused compatibles] Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> Link: https://lore.kernel.org/r/20240930215001.1999212-3-heiko@sntech.de Signed-off-by: Heiko Stuebner <heiko@sntech.de>
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 reStructuredText 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.