[CFT][patch]cfi driver support for NOR flash arrays
aduane at juniper.net
Tue Mar 15 18:56:04 UTC 2011
Marcel Moolenaar wrote:
> On Mar 14, 2011, at 8:09 AM, Aleksandr Rybalko wrote:
>> Hi, all.
>> proposed patch add support of NOR flash arrays to cfi driver
> Hi Aleksandr,
> The patch is interesting, but combines a whole bunch of different
> changes. Some of the changes are similar to the fixes we have at
> Juniper ourselves, so getting the driver sync'd up is a good idea.
> Not to mention that we have added support for the SPI interface.
> Just a quick question: is an array different from 2 independent
> CFI devices on the same bus? I mean: can we support an array by
> having 2 driver instances?
Arrays can be horizontal or vertical. A vertical array is just two chips, 0->XXXXX and XXXXX+1->YYYYYY. This would work with 2 driver instances.
Horizontal (interleaved) is two chips that share a single address space and provide alternating bits/bytes/words. This would not work with two instances.
Andrew Duane Juniper Networks
978-589-0551 10 Technology Park Dr
aduane at juniper.net Westford, MA 01886-3418
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