8a091d847c
Add a new coresight device type, which do not belong to any of the existing types, i.e, source, sink, link etc. A helper device could be connected to a coresight device, which could augment the functionality of the coresight device. This is intended to cover Coresight Address Translation Unit (CATU) devices, which provide improved Scatter Gather mechanism for TMC ETR. The idea is that the helper device could be controlled by the driver of the device it is attached to (in this case ETR), transparent to the generic coresight driver (and paths). The operations include enable(), disable(), both of which could accept a device specific "data" which the driving device and the helper device could share. Since they don't appear in the coresight "path" tracked by software, we have to ensure that they are powered up/down whenever the master device is turned on. Cc: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com> Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.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.
See Documentation/00-INDEX for a list of what is contained in each file.
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.