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Cristian Birsan 11d5441cde
arm: dts: Enable device-tree overlay support for AT91 boards
Add the '-@' DTC option for AT91 boards that have device-tree overlays.
This option populates the '__symbols__' node that contains all the
necessary symbols for supporting device-tree overlays (from bootloader)
on these devices.

This change increases the size of the resulting DTB with ~30%-40%. Below
are the measurements performed v6.4-rc6:

at91-sam9x60_curiosity.dtb	28499 -> 36641 bytes
at91-sam9x60ek.dtb		30867 -> 39609 bytes
at91-sama5d27_som1_ek.dtb	26086 -> 34166 bytes
at91-sama5d27_wlsom1_ek.dtb	26045 -> 33184 bytes
at91-sama5d2_icp.dtb		27521 -> 36155 bytes
at91-sama5d2_ptc_ek.dtb		23237 -> 29612 bytes
at91-sama5d2_xplained.dtb	27262 -> 35326 bytes
at91-sama5d3_eds.dtb		27924 -> 39939 bytes
at91-sama5d3_xplained.dtb	28400 -> 40650 bytes
at91-sama5d4_xplained.dtb	26456 -> 36107 bytes
at91-sama7g5ek.dtb		29212 -> 37289 bytes

Signed-off-by: Cristian Birsan <cristian.birsan@microchip.com>
Link: https://lore.kernel.org/r/20230616152932.1484154-1-cristian.birsan@microchip.com
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
History 2023-06-20 23:03:19 +02:00
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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.