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613a2e655d
The DWC3 IP block is handled by three distinct device drivers: XHCI, DWC3 core and a platform specific (optional) DWC3 glue driver. This has resulted in, at least in the case of the Qualcomm glue, the presence of a number of layering violations, where the glue code either can't handle, or has to work around, the fact that core might not probe deterministically. An example of this is that the suspend path should operate slightly different depending on the device operating in host or peripheral mode, and the only way to determine the operating state is to peek into the core's drvdata. The Qualcomm glue driver is expected to make updates in the qscratch register region (the "glue" region) during role switch events, but with the glue and core split using the driver model, there is no reasonable way to introduce listeners for mode changes. Split the dwc3 core platform_driver callbacks and their implementation and export the implementation, to make it possible to deterministically instantiate the dwc3 core as part of the dwc3 glue drivers and to allow flattening of the DeviceTree representation. Acked-by: Thinh Nguyen <Thinh.Nguyen@synopsys.com> Tested-by: Neil Armstrong <neil.armstrong@linaro.org> # on SM8650-QRD Signed-off-by: Bjorn Andersson <bjorn.andersson@oss.qualcomm.com> Link: https://lore.kernel.org/r/20250414-dwc3-refactor-v7-3-f015b358722d@oss.qualcomm.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
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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.