dt-bindings: Add documentation for Broadcom Vulcan

Update arm/cpus.txt to add "brcm,vulcan" CPU. Add documentation
for Broadcom Vulcan boards in arm/bcm/brcm,vulcan-soc.txt

Signed-off-by: Jayachandran C <jchandra@broadcom.com>

1 files changed, 10 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/arm/bcm/brcm,vulcan-soc.txt b/Documentation/devicetree/bindings/arm/bcm/brcm,vulcan-soc.txt
new file mode 100644
index 000000000000..223ed3471c08
--- /dev/null
+++ b/Documentation/devicetree/bindings/arm/bcm/brcm,vulcan-soc.txt
@@ -0,0 +1,10 @@
+Broadcom Vulcan device tree bindings
+------------------------------------
+
+Boards with Broadcom Vulcan shall have the following root property:
+
+Broadcom Vulcan Evaluation Board:
+  compatible = "brcm,vulcan-eval", "brcm,vulcan-soc";
+
+Generic Vulcan board:
+  compatible = "brcm,vulcan-soc";