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This patch invokes the DSP power down notifier to inform DSP that driver is going to be removed. The module removal entails DSP power down, disabling of IRQs and more. Therefore it is highly recommended to inform the DSP about this upcoming event. Due to hardware limitations on some Intel platforms it is necessary to power gate all LPSRAM banks that were enabled prior to controller reset. Otherwise, an attempt to write LPSRAM control registers may have no effect. Signed-off-by: Marcin Rajwa <marcin.rajwa@linux.intel.com> Signed-off-by: Kai Vehmanen <kai.vehmanen@linux.intel.com> Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com> Link: https://lore.kernel.org/r/20200515135958.17511-4-kai.vehmanen@linux.intel.com Signed-off-by: Mark Brown <broonie@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 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.