21a4d7386e
The resets for the DSP processors on K3 SoCs are managed through the Power and Sleep Controller (PSC) module. Each DSP typically has two resets - a global module reset for powering on the device, and a local reset that affects only the CPU while allowing access to the other sub-modules within the DSP processor sub-systems. The C66x DSPs have two levels of internal RAMs that can be used to boot from, and the firmware loading into these RAMs require the local reset to be asserted with the device powered on/enabled using the module reset. Enhance the K3 DSP remoteproc driver to add support for loading into the internal RAMs. The local reset is deasserted on SoC power-on-reset, so logic has to be added in probe in remoteproc mode to balance the remoteproc state-machine. Note that the local resets are a no-op on C71x cores, and the hardware does not supporting loading into its internal RAMs. Signed-off-by: Suman Anna <s-anna@ti.com> Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org> Reviewed-by: Mathieu Poirier <mathieu.poirier@linaro.org> Link: https://lore.kernel.org/r/20200721223617.20312-7-s-anna@ti.com Signed-off-by: Bjorn Andersson <bjorn.andersson@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 Restructured Text 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.