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Diffstat (limited to 'doc/README.at91-soc')
| -rw-r--r-- | doc/README.at91-soc | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/doc/README.at91-soc b/doc/README.at91-soc index bed035c88d2..425fc588f04 100644 --- a/doc/README.at91-soc +++ b/doc/README.at91-soc @@ -39,3 +39,26 @@ The method for updating 3. add new structures for SoC access 4. Convert arch, driver and boards file to new SoC 5. remove legacy code, if all boards and drives are ready + + Join AT91 and AT91RM9200 SoC +============================== + +Approximately 95 percent of AT91 and AT91RM9200 SoC parts are the same. +So, we should use the chance, to join both archs togetter. + +To do this follow step needed: + +1. change Makefile + @$(MKCONFIG) $(@:_config=) arm arm920t board vendor at91rm9200 + to + @$(MKCONFIG) $(@:_config=) arm arm920t board vendor at91 +2. remove CONFIG_AT91_LEGACY in board config +3. convert boards file to new SoC access +4. convert or change drivers + +To support the joining process, a new SoC dir (at91) has been adding to +arm920t arch directory. This directory contains files like at91rm9200 dir, but +uses the new c structure Soc access. The advantage of this is, we don't merge +old Soc access code and new code while the board are not converted. +Finally we can delete the whole at91rm9200 dir, if all board support the +new AT91-SoC access. |