Thread (54 messages) 54 messages, 8 authors, 2007-08-24

Re: [PATCH 2/6] PowerPC 440EPx: Sequoia DTS

From: Segher Boessenkool <hidden>
Date: 2007-08-06 20:20:01

quoted
quoted
+     - compatible : should contain the specific model of flash 
chip(s) used
+       followed by either "cfi-flash" or "jedec-flash"
    This "compatible" prop (and the node in whole) doesn't say a
thing about how the flash is mapped into the CPU address space.  I
strongly disagree that this node provides enough info to select a
driver. :-/
To be honest, I'm not sure that describing the mapping is really the
job of the compatible property.  That the flash is mapped into the
address space is kind of implicit in the way the reg interacts with
the parents' ranges property.
Exactly.
Can you describe some of the options for *not* direct mapped flash
chips - I can't reasonably come up with a way of describing the
distinction when I've never seen NOR flash other than direct mapped.
What, you've never seen SPI flash or IIC flash?  :-)

Not that these are handled by the MTD framework AFAIK.


Segher
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