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authorAntonio Borneo <borneo.antonio@gmail.com>2010-04-20 12:15:49 +0800
committerØyvind Harboe <oyvind.harboe@zylin.com>2010-05-16 13:39:47 +0200
commit61bb0d3d235c659eb407a7032aa9ec70a914dc03 (patch)
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NOR/CFI: identify memory accesses not using "bus_width".
Since NOR flash devices does not handle "byte enable lanes", each read/write access involves the whole "chip_width". When multiple devices are in parallel, usually all chips are enabled during each access. All such cases are compatible with flash accesses at "bus_width" size. Access at "bus_width" size is mandatory for write access to avoid transferring of garbage values to flash. During read access the flash controller should take care, and discard unneeded bytes. Anyway, it is good practice to use "bus_width" size also for read. Every memory access that does not respect "bus_width" size is marked with a "FIXME" comment. Signed-off-by: Antonio Borneo <borneo.antonio@gmail.com>
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