[U-Boot-Users] [PATCH] at45-split (1/3) (resubmit due to bad CHANGELOG info in first version)

[Ulf Samuelsson]

-------------------------------------------------------------
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"



-------------------------------------------------------------
CHANGELOG:
Author: Ulf Samuelsson <ulf at atmel.com>
Date:   Thu Feb  1 21:18:53 CET 2007

    Make at45 driver available to all boards.
    Move SPI low level part to cpu/arm920t/at91rm9200


-------------------------------------------------------------
No new configuration options
-------------------------------------------------------------
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

-------------------------------------------------------------
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
-------------------------------------------------------------
Tested on PPC and ARM

Best Regards
Ulf Samuelsson

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