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When we are resuming from a system suspend the CS35L56 has probably been hard reset (usually a power-on reset). So we must wait for the firmware to boot. On SoundWire we also need it to re-initialize before we can read the registers to check the CS35L56 state. The simplest way to handle this is for runtime-resume to always wait for firmware boot. If the firmware is already booted the overhead is only one register read. The system-resume will have to runtime-resume the driver anyway before attempting any register access. So this will automatically include the wait for initialization on SoundWire. Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com> Link: https://lore.kernel.org/r/20230411152528.329803-5-rf@opensource.cirrus.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.