These changes are the raw update to linux-4.4.6-rt14. Kernel sources

[kvmfornfv.git] / kernel / Documentation / devicetree / bindings / mailbox / brcm,bcm2835-mbox.txt

diff --git a/kernel/Documentation/devicetree/bindings/mailbox/brcm,bcm2835-mbox.txt b/kernel/Documentation/devicetree/bindings/mailbox/brcm,bcm2835-mbox.txt
new file mode 100644 (file)
index 0000000..e893615
--- /dev/null
+++ b/kernel/Documentation/devicetree/bindings/mailbox/brcm,bcm2835-mbox.txt
@@ -0,0 +1,26 @@
+Broadcom BCM2835 VideoCore mailbox IPC
+
+Required properties:
+
+- compatible:  Should be "brcm,bcm2835-mbox"
+- reg:         Specifies base physical address and size of the registers
+- interrupts:  The interrupt number
+                 See bindings/interrupt-controller/brcm,bcm2835-armctrl-ic.txt
+- #mbox-cells: Specifies the number of cells needed to encode a mailbox
+                 channel. The value shall be 0, since there is only one
+                 mailbox channel implemented by the device.
+
+Example:
+
+mailbox: mailbox@7e00b800 {
+       compatible = "brcm,bcm2835-mbox";
+       reg = <0x7e00b880 0x40>;
+       interrupts = <0 1>;
+       #mbox-cells = <0>;
+};
+
+firmware: firmware {
+       compatible = "raspberrypi,firmware";
+       mboxes = <&mailbox>;
+       #power-domain-cells = <1>;
+};