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Device-tree bindings for MDIO define per-PHY reset-gpios as well as a global reset-gpios property at the MDIO node level which controls all devices on the bus. The latter is most likely a workaround for the chicken-and-egg problem where we cannot read the ID of the PHY before bringing it out of reset but we cannot bring it out of reset until we've read its ID. I have proposed a comprehensive solution for this problem in 2020 but it never got upstream. We do however have workaround in place which allows us to hard-code the PHY id in the compatible property, thus skipping the ID scanning. Let's make the device-tree for sa8775p-ride slightly more correct by moving the reset-gpios property to the PHY node with its ID put into the PHY node's compatible. Link: https://lore.kernel.org/all/20200622093744.13685-1-brgl@bgdev.pl/ Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org> Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org> Tested-by: Andrew Halaney <ahalaney@redhat.com> Link: https://lore.kernel.org/r/20230810080909.6259-5-brgl@bgdev.pl Signed-off-by: Bjorn Andersson <andersson@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.