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dt/bindings: Add binding for the BCM2835 mailbox driver

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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>
This commit is contained in:
Lubomir Rintel 2015-05-05 13:27:44 -07:00 committed by Jassi Brar
parent 2d805fc1c6
commit d4b5c782b9
1 changed files with 26 additions and 0 deletions
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26
Documentation/devicetree/bindings/mailbox/brcm,bcm2835-mbox.txt Normal file
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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>;
};