diff options
author | Simon Glass <sjg@chromium.org> | 2016-05-14 18:49:27 -0600 |
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committer | Tom Rini <trini@konsulko.com> | 2016-05-27 15:39:50 -0400 |
commit | 89b199c3d4416e63d025e4927da8d4fde1de8b2a (patch) | |
tree | 278684fe42b9d28b33ab95da42b051c2d131c1c0 /doc/README.generic-board | |
parent | feee28f7d744fec50f61b4d46d3dfac165316fbc (diff) |
Remove/update old generic-board documentation and warning
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>
Diffstat (limited to 'doc/README.generic-board')
-rw-r--r-- | doc/README.generic-board | 69 |
1 files changed, 7 insertions, 62 deletions
diff --git a/doc/README.generic-board b/doc/README.generic-board index 734f1aa924..6858c4daaf 100644 --- a/doc/README.generic-board +++ b/doc/README.generic-board @@ -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 |