Commit c5a88dd9 authored by Stefan Roese's avatar Stefan Roese Committed by Grant Likely

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

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: default avatarStefan Roese <sr@denx.de>
Signed-off-by: default avatarGrant Likely <grant.likely@secretlab.ca>
parent efcc2da3
...@@ -5,7 +5,9 @@ file systems on embedded devices. ...@@ -5,7 +5,9 @@ file systems on embedded devices.
- compatible : should contain the specific model of flash chip(s) - compatible : should contain the specific model of flash chip(s)
used, if known, followed by either "cfi-flash" or "jedec-flash" 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 - bank-width : Width (in bytes) of the flash bank. Equal to the
device width times the number of interleaved chips. device width times the number of interleaved chips.
- device-width : (optional) Width of a single flash chip. If - device-width : (optional) Width of a single flash chip. If
...@@ -61,3 +63,18 @@ Example: ...@@ -61,3 +63,18 @@ Example:
read-only; 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>;
};
};
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