From: Michal Suchanek <hramrach@xxxxxxxxx>
To avoid conflict with other drivers using subnodes of the mtd device
create only one ofpart-specific node rather than any number of
arbitrary partition subnodes.
Signed-off-by: Michal Suchanek <hramrach@xxxxxxxxx>
Acked-by: Rob Herring <robh@xxxxxxxxxx>
Signed-off-by: Brian Norris <computersforpeace@xxxxxxxxx>
---
.../devicetree/bindings/mtd/partition.txt | 71 +++++++++++++---------
1 file changed, 42 insertions(+), 29 deletions(-)
diff --git a/Documentation/devicetree/bindings/mtd/partition.txt b/Documentation/devicetree/bindings/mtd/partition.txt
index 8e5557da1955..f1e2a02381a4 100644
--- a/Documentation/devicetree/bindings/mtd/partition.txt
+++ b/Documentation/devicetree/bindings/mtd/partition.txt
@@ -4,10 +4,17 @@ Partitions can be represented by sub-nodes of an mtd device. This can be used
on platforms which have strong conventions about which portions of a flash are
used for what purposes, but which don't use an on-flash partition table such
as RedBoot.
-NOTE: if the sub-node has a compatible string, then it is not a partition.
-#address-cells & #size-cells must both be present in the mtd device. There are
-two valid values for both:
+The partition table should be a subnode of the mtd node and should be named
+'partitions'. Partitions are defined in subnodes of the partitions node.
+
+For backwards compatibility partitions as direct subnodes of the mtd device are
+supported. This use is discouraged.
+NOTE: also for backwards compatibility, direct subnodes that have a compatible
+string are not considered partitions, as they may be used for other bindings.
+
+#address-cells & #size-cells must both be present in the partitions subnode of the
+mtd device. There are two valid values for both:
<1>: for partitions that require a single 32-bit cell to represent their
size/address (aka the value is below 4 GiB)
<2>: for partitions that require two 32-bit cells to represent their
@@ -28,44 +35,50 @@ Examples:
flash@0 {
- #address-cells = <1>;
- #size-cells = <1>;
+ partitions {
+ #address-cells = <1>;
+ #size-cells = <1>;
- partition@0 {
- label = "u-boot";
- reg = <0x0000000 0x100000>;
- read-only;
- };
+ partition@0 {
+ label = "u-boot";
+ reg = <0x0000000 0x100000>;
+ read-only;
+ };
- uimage@100000 {
- reg = <0x0100000 0x200000>;
+ uimage@100000 {
+ reg = <0x0100000 0x200000>;
+ };
};
};
flash@1 {
- #address-cells = <1>;
- #size-cells = <2>;
+ partitions {
+ #address-cells = <1>;
+ #size-cells = <2>;
- /* a 4 GiB partition */
- partition@0 {
- label = "filesystem";
- reg = <0x00000000 0x1 0x00000000>;
+ /* a 4 GiB partition */
+ partition@0 {
+ label = "filesystem";
+ reg = <0x00000000 0x1 0x00000000>;
+ };
};
};
flash@2 {
- #address-cells = <2>;
- #size-cells = <2>;
+ partitions {
+ #address-cells = <2>;
+ #size-cells = <2>;
- /* an 8 GiB partition */
- partition@0 {
- label = "filesystem #1";
- reg = <0x0 0x00000000 0x2 0x00000000>;
- };
+ /* an 8 GiB partition */
+ partition@0 {
+ label = "filesystem #1";
+ reg = <0x0 0x00000000 0x2 0x00000000>;
+ };
- /* a 4 GiB partition */
- partition@200000000 {
- label = "filesystem #2";
- reg = <0x2 0x00000000 0x1 0x00000000>;
+ /* a 4 GiB partition */
+ partition@200000000 {
+ label = "filesystem #2";
+ reg = <0x2 0x00000000 0x1 0x00000000>;
+ };
};
};
--
2.6.0.rc2.230.g3dd15c0
--
To unsubscribe from this list: send the line "unsubscribe devicetree" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
