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Some SoCs, like the MediaTek Dimensity 9400 (MT6991), have granular power controls and will disable power to the infracfg to save power when the platform is in deeper sleep states (or when no IP in the the infracfg macro-block is in use). These chips also cannot control the infracfg power states directly via AP register writes as those are protected by the secure world. Add a new MTK_SCPD_INFRA_PWR_CTL cap and, if present, make a call to the secure world to poweron the infracfg block, as the HWV IP resides in there, when executing HWV domains power sequences. Reviewed-by: Nícolas F. R. A. Prado <nfraprado@collabora.com> Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.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.