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The first supported GPU only used a single power domain so this was automatically handled by the device runtime. In order to support multiple power domains, they must be enumerated from devicetree and linked to both the GPU device and each other to ensure correct power sequencing at start time. For all Imagination Rogue GPUs, power domains are named "a", "b", etc. and the sequence A->B->... is always valid for startup with the reverse true for shutdown. Note this is not always the *only* valid sequence, but it's simple and does not require special-casing for different GPU power topologies. Reviewed-by: Frank Binns <frank.binns@imgtec.com> Link: https://lore.kernel.org/r/20250410-sets-bxs-4-64-patch-v1-v6-5-eda620c5865f@imgtec.com Signed-off-by: Matt Coster <matt.coster@imgtec.com>
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.