[U-Boot-Users] [PATCH] at45-split (1/3)

2 Feb 2007


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DESCRIPTION
The at45.c dataflash driver is currently duplicated in
* board/at91rm9200dk
* board/cmc_pu2
This patch splits the at45 dataflash driver into a 
* cpu-dependent   part located in cpu/arm920t/at91rm9200
* cpu-independent part located in drivers/at45.c
making AT45 Dataflash available to all boards with an
appropriate SPI driver.
All new AT91 boards use this driver, so if/when patches
for these boards are accepted into mainline, having
a common driver will reduce the size of the U-boot source 
and make the board support more maintainable.
The "drivers/at45.c" is compiled for all boards
but contain a configuration test:
#ifdef CONFIG_HAS_DATAFLASH
...
#endif
around the code, so if this is not set, the at45
driver will not add code to the system.
------
The current at45.c contains both the cpu specific
spi access routines and a higher layer 
dataflash access routine which calls the lower layer
spi routines to read/write dataflash.
To make the at45 independent on the CPU, the
spi layer has been removed from the driver
and placed in the cpu/arm920t/at91rm9200/spi.c.
CPU specific "includes" are moved inside the 
CONFIG_HAS_DATAFLASH test
Makefile changes
at45.o has been removed from the Makefiles in
* "board/at91rm9200dk"
* "board/cmc_pu2"
at45.o has been added to the "drivers" Makefile.
spi.o has been added to "cpu/arm920t/at91rm9200/Makefile"
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CHANGELOG:
Author: Ulf Samuelsson ulf@atmel.com
Date:	Thu Feb  1 21:18:53 CET 2007
Initial support for MPC8641 HPCN board.
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No new configuration options
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Patch:
    Attached in plaintext
    Consists of three parts.
    1.	Split and move
    2.	Removal of at45.c from board/at91rm9200dk
    3.	Removal of at45.c from board/cmc_pu2
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Patch generated by 
    diff -purN \
    u-boot-2007-02-01-0rig \
    u-boot-2007-02-01 > \
    u-boot-2007-02-01-at45_split.1_3.patch
from the parent directory
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Tested on PPC and ARM
Best Regards
Ulf Samuelsson