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Add cs_amp_set_efi_calibration_data() to write an amp calibration blob to UEFI calibration variable. The UEFI variable will be updated or created as necessary. - If a Vendor-specific variable exists it will be updated, else if the Cirrus variable exists it will be update else the Cirrus variable will be created. Some collateral changes are required: - cs_amp_convert_efi_status() now specifically handles EFI_WRITE_PROTECTED error. - cs_amp_get_cal_efi_buffer() can optionally return the name, guid and attr of the variable it found. - cs_amp_get_cal_efi_buffer() will update the 'size' field of the returned data blob if it is zero. The BIOS could have pre-allocated the UEFI variable as zero-filled Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com> Reviewed-by: Takashi Iwai <tiwai@suse.de> Link: https://patch.msgid.link/20251021105022.1013685-9-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 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.