linux-kernel - [PATCHv7 3/5] Mailbox: Generic: Specify mailbox api bindings

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Date:	Thu, 12 Jun 2014 22:31:54 +0530
From:	Jassi Brar <jaswinder.singh@...aro.org>
To:	linux-kernel@...r.kernel.org
Cc:	devicetree@...r.kernel.org, mporter@...aro.org, patches@...aro.org,
	bjorn@...o.se, ashwin.chaugule@...aro.org,
	gregkh@...uxfoundation.org, s-anna@...com, loic.pallardy@...com,
	lftan.linux@...il.com, slapdau@...oo.com.au,
	courtney.cavin@...ymobile.com, pawel.moll@....com,
	robh+dt@...nel.org, mark.rutland@....com,
	ijc+devicetree@...lion.org.uk, arnd@...db.de, joshc@...eaurora.org,
	linus.walleij@...aro.org, galak@...eaurora.org,
	ks.giri@...sung.com, Jassi Brar <jaswinder.singh@...aro.org>
Subject: [PATCHv7 3/5] Mailbox: Generic: Specify mailbox api bindings

 Due to the platform specific nature of remote's firmware, we can't do much
to facilitate shareable client drivers. So the Mailbox api is more like a
bunch of useful functions put together. The only feature that can be
abstracted out is mailbox channel assignment to client drivers, which this
binding specifies.

Signed-off-by: Jassi Brar <jaswinder.singh@...aro.org>
---
 .../devicetree/bindings/mailbox/mailbox.txt        | 33 ++++++++++++++++++++++
 1 file changed, 33 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/mailbox/mailbox.txt

diff --git a/Documentation/devicetree/bindings/mailbox/mailbox.txt b/Documentation/devicetree/bindings/mailbox/mailbox.txt
new file mode 100644
index 0000000..3f00955
--- /dev/null
+++ b/Documentation/devicetree/bindings/mailbox/mailbox.txt
@@ -0,0 +1,33 @@
+* Generic Mailbox Controller and client driver bindings
+
+Generic binding to provide a way for Mailbox controller drivers to
+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.
+
+Example:
+	mailbox: mailbox {
+		...
+		#mbox-cells = <1>;
+	};
+
+
+* Mailbox Client
+
+Required property:
+- mbox: List of phandle and mailbox channel specifier.
+
+- mbox-names: List of identifier strings for each mailbox channel
+		required by the client.
+
+Example:
+	pwr_cntrl: power {
+		...
+		mbox-names = "pwr-ctrl", "rpc";
+		mbox = <&mailbox 0
+			&mailbox 1>;
+	};
-- 
1.8.1.2

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