mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
synced 2026-05-07 20:58:14 -04:00
ab16dfb99c
On newer Airoha SoC, CPU Frequency is scaled indirectly with SMC commands to ATF. A virtual clock is exposed. This virtual clock is a get-only clock and is used to expose the current global CPU clock. The frequency info comes by the output of the SMC command that reports the clock in MHz. The SMC sets the CPU clock by providing an index, this is modelled as performance states in a power domain. CPUs can't be individually scaled as the CPU frequency is shared across all CPUs and is global. Signed-off-by: Christian Marangi <ansuelsmth@gmail.com> Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org> Reviewed-by: Rob Herring (Arm) <robh@kernel.org> Signed-off-by: Viresh Kumar <viresh.kumar@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.