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powerpc/device-tree: Document MTD nodes with multiple "reg" tuples

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Add binding for mtd nodes with multiple reg tuples.  Multiple reg tuples
are used when the flash region covers multiple devices of the same type,
but not necessarily the same size.

Signed-off-by: Stefan Roese <sr@denx.de>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
This commit is contained in:
Stefan Roese 2009-04-16 15:11:54 -06:00 committed by Grant Likely
parent efcc2da3fd
commit c5a88dd90c
1 changed files with 18 additions and 1 deletions
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19
Documentation/powerpc/dts-bindings/mtd-physmap.txt
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@ -5,7 +5,9 @@ file systems on embedded devices.
- compatible : should contain the specific model of flash chip(s)
used, if known, followed by either "cfi-flash" or "jedec-flash"
- reg : Address range of the flash chip
- reg : Address range(s) of the flash chip(s)
It's possible to (optionally) define multiple "reg" tuples so that
non-identical NOR chips can be described in one flash node.
- bank-width : Width (in bytes) of the flash bank. Equal to the
device width times the number of interleaved chips.
- device-width : (optional) Width of a single flash chip. If
@ -61,3 +63,18 @@ Example:
read-only;
};
};
Here an example with multiple "reg" tuples:
flash@f0000000,0 {
#address-cells = <1>;
#size-cells = <1>;
compatible = "intel,PC48F4400P0VB", "cfi-flash";
reg = <0 0x00000000 0x02000000
0 0x02000000 0x02000000>;
bank-width = <2>;
partition@0 {
label = "test-part1";
reg = <0 0x04000000>;
};
};