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ref-manual/variables: document the FIRMWARE_COMPRESSION variable

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Added in oecore after the 20241017 update.

(From yocto-docs rev: 9073f575f169ab545198d82b69cca5f9e3db152f)

Signed-off-by: Antonin Godard <antonin.godard@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
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Antonin Godard
2024-12-20 13:16:30 +01:00
committed by Richard Purdie
parent f185c78263
commit 81412adb5e
1 changed files with 10 additions and 0 deletions
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documentation/ref-manual/variables.rst
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@@ -3038,6 +3038,16 @@ system and gives an overview of their function and contents.
tables, examine the existing ``fs-perms.txt``,
``fs-perms-volatile-log.txt`` and ``fs-perms-volatile-tmp.txt`` files.
:term:`FIRMWARE_COMPRESSION`
The :term:`FIRMWARE_COMPRESSION` allows compressing the firmware provided
by the ``linux-firmware`` recipe. The default value of this variable is an
empty string (no compression), and the possible values it can take are
``xz`` and ``zst``. This can allow significant disk space savings.
For this to work, the Linux Kernel requires the
``CONFIG_FW_LOADER_COMPRESS_XZ`` or ``CONFIG_FW_LOADER_COMPRESS_ZSTD``
configuration options to be set.
:term:`FIT_ADDRESS_CELLS`
Specifies the value of the ``#address-cells`` value for the
description of the FIT image.