[PATCH v6 1/5] dt-bindings: mailbox: allow #mbox-cells = <0>;

[Tudor Ambarus]

There are mailbox clients that can discover the mailbox channel
identifiers at runtime. For such cases passing the channel
identifiers via DT is redundant.

The framework API will be supplied with mbox_request_channel_by_args().
It will allow clients to request a mailbox channel using the runtime
discovered channel identifiers.

Add support for referencing controllers solely by phandle.

Signed-off-by: Tudor Ambarus <tudor.ambarus at linaro.org>
---
 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 af8ecee2ac68..fc31a4a3b637 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: Must be at least 0. Number of cells in a mailbox specifier.
 
 Example:
 	mailbox: mailbox {

-- 
2.47.1.613.gc27f4b7a9f-goog