dt-bindings: mtd: describe BCM963XX ImageTag format and usage
Describe how to use the BCM963XX ImageTag format in a mixed flash layout
environment.
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
diff --git a/Documentation/devicetree/bindings/mtd/partitions/brcm,bcm963xx-imagetag.txt b/Documentation/devicetree/bindings/mtd/partitions/brcm,bcm963xx-imagetag.txt
new file mode 100644
index 0000000..f8b7418
--- /dev/null
+++ b/Documentation/devicetree/bindings/mtd/partitions/brcm,bcm963xx-imagetag.txt
@@ -0,0 +1,45 @@
+Broadcom BCM963XX ImageTag Partition Container
+==============================================
+
+Some Broadcom BCM63XX SoC based devices contain additional, non discoverable
+partitions or non standard bootloader partition sizes. For these a mixed layout
+needs to be used with an explicit firmware partition.
+
+The BCM963XX ImageTag is a simple firmware header describing the offsets and
+sizes of the rootfs and kernel parts contained in the firmware.
+
+Required properties:
+- compatible : must be "brcm,bcm963xx-imagetag"
+
+Example:
+
+flash@1e000000 {
+ compatible = "cfi-flash";
+ reg = <0x1e000000 0x2000000>;
+ bank-width = <2>;
+
+ partitions {
+ compatible = "fixed-partitions";
+ #address-cells = <1>;
+ #size-cells = <1>;
+
+ cfe@0 {
+ reg = <0x0 0x10000>;
+ read-only;
+ };
+
+ firmware@10000 {
+ reg = <0x10000 0x7d0000>;
+ compatible = "brcm,bcm963xx-imagetag";
+ };
+
+ caldata@7e0000 {
+ reg = <0x7e0000 0x10000>;
+ read-only;
+ };
+
+ nvram@7f0000 {
+ reg = <0x7f0000 0x10000>;
+ };
+ };
+};