dt-bindings: soc: Add a binding for the Broadcom VCHIQ services. (v3)

The VCHIQ communication channel can be provided by BCM283x and Capri
SoCs, to communicate with the VPU-side OS services.

Signed-off-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/Documentation/devicetree/bindings/soc/bcm/brcm,bcm2835-vchiq.txt b/Documentation/devicetree/bindings/soc/bcm/brcm,bcm2835-vchiq.txt
new file mode 100644 (file)
index 0000000..8dd7b3a
--- /dev/null
+++ b/Documentation/devicetree/bindings/soc/bcm/brcm,bcm2835-vchiq.txt
@@ -0,0 +1,16 @@
+Broadcom VCHIQ firmware services
+
+Required properties:
+
+- compatible:  Should be "brcm,bcm2835-vchiq"
+- reg:         Physical base address and length of the doorbell register pair
+- interrupts:  The interrupt number
+                 See bindings/interrupt-controller/brcm,bcm2835-armctrl-ic.txt
+
+Example:
+
+mailbox@7e00b840 {
+       compatible = "brcm,bcm2835-vchiq";
+       reg = <0x7e00b840 0xf>;
+       interrupts = <0 2>;
+};