From: Lubomir Rintel <lkund...@v3.sk>
Signed-off-by: Lubomir Rintel <lkund...@v3.sk>
Signed-off-by: Craig McGeachie <slap...@yahoo.com.au>
Signed-off-by: Eric Anholt <e...@anholt.net>
Acked-by: Lee Jones <lee.jo...@linaro.org>
Acked-by: Stephen Warren <swar...@wwwdotorg.org>
---
v2: Split into a separate patch for submitting to the devicetree list.
Consistently start node docs with a capital letter. device's
address in the example shouldn't have "0x". Drop machine-specific
interrupt numbers from the docs. (changes by anholt).
v3: Move the file to just bcm2835-mbox.txt, clean up formatting
(changes by anholt, from review by Lee Jones).
v4: Move file back by consensus from various Broadcom platform
maintainers (changes by anholt, acked by Lee Jones).
v5: Document that the mailbox cell should be 0 in clients, and add an
example of a client (changes by anholt, from review by Jassi).
.../bindings/mailbox/brcm,bcm2835-mbox.txt | 27 ++++++++++++++++++++++
1 file changed, 27 insertions(+)
create mode 100644
Documentation/devicetree/bindings/mailbox/brcm,bcm2835-mbox.txt
diff --git a/Documentation/devicetree/bindings/mailbox/brcm,bcm2835-mbox.txt
b/Documentation/devicetree/bindings/mailbox/brcm,bcm2835-mbox.txt
new file mode 100644
index 0000000..731de34
--- /dev/null
+++ b/Documentation/devicetree/bindings/mailbox/brcm,bcm2835-mbox.txt
@@ -0,0 +1,27 @@
+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 1. Clients should supply a value
+ of 0 for the mailbox channel, because there is only one
+ exposed
+
+Example:
+
+mailbox: mailbox@7e00b800 {
+ compatible = "brcm,bcm2835-mbox";
+ reg = <0x7e00b880 0x40>;
+ interrupts = <0 1>;
+ #mbox-cells = <1>;
+};
+
+firmware: firmware {
+ compatible = "raspberrypi,firmware";
+ mboxes = <&mailbox 0>;
+ #power-domain-cells = <1>;
+};
--
2.1.4
--
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