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Add helper functions for performing factory calibration. cs_amp_read_cal_coeffs() reads the results of a calibration into a struct cirrus_amp_cal_data. The calTime member is also filled in with the current time (which is defined to be in Windows format). cs_amp_write_ambient_temp() writes a given temperature value to the firmware control for ambient temperature. The cs_amp_cal_target_u64() has been moved into the header file so that it can be used by the calling code and by KUnit tests. cs_amp_create_debugfs() creates a debugfs directory to contain debugfs files related to calibration. This is placed in a directory in debugfs root, named "cirrus_logic". The purpose of this is to make it easier for tooling to find the files it needs by keeping control of the layout under this directory. By contrast the ASoC debugfs can vary between kernel releases and doesn't have a strictly stable naming convention. HDA does not have a debugfs directory at all and enabling the general ALSA debugfs (which is normally disabled) has other side-effects. Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com> Reviewed-by: Takashi Iwai <tiwai@suse.de> Link: https://patch.msgid.link/20251021105022.1013685-3-rf@opensource.cirrus.com Signed-off-by: Mark Brown <broonie@kernel.org> |
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| README | ||
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 reStructuredText 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.