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authorLubomir Rintel <lkundrak@v3.sk>2015-05-05 23:27:44 +0300
committerJassi Brar <jaswinder.singh@linaro.org>2015-06-09 13:35:29 +0300
commitd4b5c782b9f4ef5b3c34cb369989cc2fc68f7391 (patch)
treead5aacb48cd0958a7f2a222fcdbdff384c4f3635 /Documentation/devicetree/bindings/mailbox/brcm,bcm2835-mbox.txt
parent2d805fc1c6b2ec09f27bcd951c2aee3da919f81a (diff)
downloadlinux-d4b5c782b9f4ef5b3c34cb369989cc2fc68f7391.tar.xz
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 <lkundrak@v3.sk> Signed-off-by: Craig McGeachie <slapdau@yahoo.com.au> Signed-off-by: Eric Anholt <eric@anholt.net> Acked-by: Lee Jones <lee.jones@linaro.org> Acked-by: Stephen Warren <swarren@wwwdotorg.org> Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
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+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>;
+};