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99aae70551
The HDA driver intentionally drops repeated writes to registers in some circumstances, beyond the suppression of noop writes that regmap does in regmap_update_bits(). It does this by checking if the register is cached before doing a regmap_update_bits(), now we have an API for querying this directly use it directly rather than trying a read in cache only mode making the code a little clearer. Reviewed-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Mark Brown <broonie@kernel.org> Link: https://lore.kernel.org/r/20230717-regmap-cache-check-v1-3-73ef688afae3@kernel.org 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.