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Remove/update old generic-board documentation and warning

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Remove the warning from the Makefile, since boards that do not use generic
board will no longer build. Also update documentation.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Andreas Bießmann <andreas@biessmann.org>
This commit is contained in:
Simon Glass
2016-05-14 18:49:27 -06:00
committed by Tom Rini
parent feee28f7d7
commit 89b199c3d4
5 changed files with 8 additions and 94 deletions
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69
doc/README.generic-board
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@@ -5,29 +5,22 @@
# SPDX-License-Identifier: GPL-2.0+
#
DEPRECATION NOTICE FOR arch/<arch>/lib/board.c
For board maintainers: Please submit patches for boards you maintain before
July 2014, to make them use generic board.
For architecture maintainers: Please submit patches to remove your
architecture-specific board.c file before October 2014.
Background
----------
U-Boot has traditionally had a board.c file for each architecture. This has
introduced quite a lot of duplication, with each architecture tending to do
U-Boot traditionally had a board.c file for each architecture. This introduced
quite a lot of duplication, with each architecture tending to do
initialisation slightly differently. To address this, a new 'generic board
init' feature was introduced a year ago in March 2013 (further motivation is
init' feature was introduced in March 2013 (further motivation is
provided in the cover letter below).
All boards and architectures have moved to this as of mid 2016.
What has changed?
-----------------
The main change is that the arch/<arch>/lib/board.c file is being removed in
The main change is that the arch/<arch>/lib/board.c file is removed in
favour of common/board_f.c (for pre-relocation init) and common/board_r.c
(for post-relocation init).
@@ -36,55 +29,6 @@ fields which are common to all architectures. Architecture-specific fields
have been moved to separate structures.
Supported Architectures
------------------------
If you are unlucky then your architecture may not support generic board.
The following architectures are supported now:
arc
arm
avr32
blackfin
m68k
microblaze
mips
nios2
powerpc
sandbox
x86
If your architecture is not supported, you need to select
HAVE_GENERIC_BOARD in arch/Kconfig
and test it with a suitable board, as follows.
Adding Support for your Board
-----------------------------
To enable generic board for your board, define CONFIG_SYS_GENERIC_BOARD in
your board config header file.
Test that U-Boot still functions correctly on your board, and fix any
problems you find. Don't be surprised if there are no problems - generic
board has had a reasonable amount of testing with common boards.
DeadLine
--------
Please don't take this the wrong way - there is no intent to make your life
miserable, and we have the greatest respect and admiration for U-Boot users.
However, with any migration there has to be a period where the old way is
deprecated and removed. Every patch to the deprecated code introduces a
potential breakage in the new unused code. Therefore:
Boards or architectures not converted over to general board by the
end of 2014 may be forcibly changed over (potentially causing run-time
breakage) or removed.
Further Background
------------------
@@ -190,3 +134,4 @@ convenience.
Simon Glass, sjg@chromium.org
March 2014
Updated after final removal, May 2016