mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
synced 2025-12-27 13:30:45 -05:00
796cba2dd4
The secure AHB to IP Slave (AIPSTZ) bus bridge provides access control configurations meant to restrict access to certain peripherals. Some of the configurations include: 1) Marking masters as trusted for R/W. Based on this (and the configuration of the accessed peripheral), the bridge may choose to abort the R/W transactions issued by certain masters. 2) Allowing/disallowing write accesses to peripherals. Add driver for this IP. Since there's currently no framework for access controllers (and since there's currently no need for having flexibility w.r.t the configurations) all this driver does is it applies a relaxed, "default" configuration, in which all masters are trusted for R/W. Note that some instances of this IP (e.g: AIPSTZ5 on i.MX8MP) may be tied to a power domain and may lose their configuration when the domain is powered off. This is why the configuration has to be restored when the domain is powered on. Co-developed-by: Daniel Baluta <daniel.baluta@nxp.com> Signed-off-by: Daniel Baluta <daniel.baluta@nxp.com> Signed-off-by: Laurentiu Mihalcea <laurentiu.mihalcea@nxp.com> Signed-off-by: Shawn Guo <shawnguo@kernel.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.