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4eae163753
The Renesas RZ/G3S need to initialize the USB BUS before transferring data due to hardware limitation. As the register that need to be touched for this is in the address space of the USB PHY, and the UBS PHY need to be initialized before any other USB drivers handling data transfer, add support to initialize the USB BUS. As the USB PHY is probed before any other USB drivers that enables clocks and de-assert the reset signals and the BUS initialization is done in the probe phase, we need to add code to de-assert reset signal and runtime resume the device (which enables its clocks) before accessing the registers. As the reset signals are not required by the USB PHY driver for the other USB PHY hardware variants, the reset signals and runtime PM was handled only in the function that initialize the USB BUS. The PHY initialization was done right after runtime PM enable to have all in place when the PHYs are registered. Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com> Link: https://lore.kernel.org/r/20240822152801.602318-11-claudiu.beznea.uj@bp.renesas.com Signed-off-by: Vinod Koul <vkoul@kernel.org> |
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| README | ||
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.