From d4b5c782b9f4ef5b3c34cb369989cc2fc68f7391 Mon Sep 17 00:00:00 2001 From: Lubomir Rintel Date: Tue, 5 May 2015 13:27:44 -0700 Subject: dt/bindings: Add binding for the BCM2835 mailbox driver This patch was split out of Lubomir's original mailbox patch by Eric Anholt, and the required properties documentation and examples have been filled out more completely and updated for the driver being changed to expose a single channel. Signed-off-by: Lubomir Rintel Signed-off-by: Craig McGeachie Signed-off-by: Eric Anholt Acked-by: Lee Jones Acked-by: Stephen Warren Signed-off-by: Jassi Brar --- .../bindings/mailbox/brcm,bcm2835-mbox.txt | 26 ++++++++++++++++++++++ 1 file changed, 26 insertions(+) create mode 100644 Documentation/devicetree/bindings/mailbox/brcm,bcm2835-mbox.txt (limited to 'Documentation/devicetree/bindings/mailbox') 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 000000000000..e893615ef635 --- /dev/null +++ b/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>; +}; -- cgit v1.2.3