Documentation: bindings: add the Berlin CPU control doc

Document the CPU control compatible, needed for the SMP support on
Marvell Berlin SoCs.

Signed-off-by: Antoine Ténart <antoine.tenart@free-electrons.com>
Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>

1 files changed, 16 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/arm/marvell,berlin.txt b/Documentation/devicetree/bindings/arm/marvell,berlin.txt
index 94013a9a8769..904de5781f44 100644
--- a/Documentation/devicetree/bindings/arm/marvell,berlin.txt
+++ b/Documentation/devicetree/bindings/arm/marvell,berlin.txt
@@ -24,6 +24,22 @@ SoC and board used. Currently known SoC compatibles are:
         ...
 }
 
+* Marvell Berlin CPU control bindings
+
+CPU control register allows various operations on CPUs, like resetting them
+independently.
+
+Required properties:
+- compatible: should be "marvell,berlin-cpu-ctrl"
+- reg: address and length of the register set
+
+Example:
+
+cpu-ctrl@f7dd0000 {
+        compatible = "marvell,berlin-cpu-ctrl";
+        reg = <0xf7dd0000 0x10000>;
+};
+
 * Marvell Berlin2 chip control binding
 
 Marvell Berlin SoCs have a chip control register set providing several