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Extend the TH1520 AON to describe the GPU clkgen reset line, required for proper GPU clock and reset sequencing. The T-HEAD TH1520 GPU requires coordinated management of two clocks (core and sys) and two resets (GPU core reset and GPU clkgen reset). Only the clkgen reset is exposed at the AON level, to support SoC specific initialization handled through a dedicated auxiliary power sequencing driver. The GPU core reset remains described in the GPU device node, as from the GPU driver's perspective, there is only a single reset line [1]. This follows upstream maintainers' recommendations [2] to abstract SoC specific details into the PM domain layer rather than exposing them to drivers directly. Link: https://lore.kernel.org/all/816db99d-7088-4c1a-af03-b9a825ac09dc@imgtec.com/ - [1] Link: https://lore.kernel.org/all/38d9650fc11a674c8b689d6bab937acf@kernel.org/ - [2] Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org> Reviewed-by: Drew Fustini <drew@pdp7.com> Reviewed-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org> Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> Signed-off-by: Michal Wilczynski <m.wilczynski@samsung.com> Link: https://lore.kernel.org/r/20250623-apr_14_for_sending-v6-2-6583ce0f6c25@samsung.com Signed-off-by: Ulf Hansson <ulf.hansson@linaro.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 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.