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Subject[PATCH V4 1/5] dt-bindings: mailbox: allow mbox-cells to be equal to 0
Date
Mailbox devices may have only one channel which means the mbox-cells
at least 1 does not make sense for this type devices. Let's remove
that limitation to allow the mbox-cells to be equal to 0.

Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Sudeep Holla <sudeep.holla@arm.com>
Cc: devicetree@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Dong Aisheng <aisheng.dong@nxp.com>
---
ChangeLog:
* New patch introduced in v3 series
* Actually there're already users in kernel with mbox-cells set to 0.
See:
arch/arm/boot/dts/bcm283x.dtsi:145: #mbox-cells = <0>;
---
Documentation/devicetree/bindings/mailbox/mailbox.txt | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/Documentation/devicetree/bindings/mailbox/mailbox.txt b/Documentation/devicetree/bindings/mailbox/mailbox.txt
index af8ecee..c2fcd05 100644
--- a/Documentation/devicetree/bindings/mailbox/mailbox.txt
+++ b/Documentation/devicetree/bindings/mailbox/mailbox.txt
@@ -6,8 +6,7 @@ assign appropriate mailbox channel to client drivers.
* Mailbox Controller

Required property:
-- #mbox-cells: Must be at least 1. Number of cells in a mailbox
- specifier.
+- #mbox-cells: Number of cells in a mailbox specifier.

Example:
mailbox: mailbox {
--
2.7.4
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