linux-kernel - [PATCH 2/3] Documentation: mailbox: Add APM X-Gene SLIMpro mailbox dts documentation

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Message-Id: <1424216511-28724-2-git-send-email-fkan@apm.com>
Date:	Tue, 17 Feb 2015 15:41:50 -0800
From:	Feng Kan <fkan@....com>
To:	patches@....com, jassisinghbrar@...il.com,
	devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Cc:	Feng Kan <fkan@....com>
Subject: [PATCH 2/3] Documentation: mailbox: Add APM X-Gene SLIMpro mailbox dts documentation

This adds the APM X-Gene SLIMpro mailbox device tree node documentation.

Signed-off-by: Feng Kan <fkan@....com>
---
 .../bindings/mailbox/xgene-slimpro-mailbox.txt     | 34 ++++++++++++++++++++++
 1 file changed, 34 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/mailbox/xgene-slimpro-mailbox.txt

diff --git a/Documentation/devicetree/bindings/mailbox/xgene-slimpro-mailbox.txt b/Documentation/devicetree/bindings/mailbox/xgene-slimpro-mailbox.txt
new file mode 100644
index 0000000..d02a3d8
--- /dev/null
+++ b/Documentation/devicetree/bindings/mailbox/xgene-slimpro-mailbox.txt
@@ -0,0 +1,34 @@
+The APM X-Gene SLIMpro mailbox is used to communicate messages between
+the ARM64 processors and the Cortex M3 (dubbed SLIMpro). It uses a simple
+interrupt based door bell mechanism and can exchange simple messages using the
+internal registers.
+
+There are total of 7 interrupts in this mailbox. Each used for an individual
+door bell (or mailbox channel).
+
+Required properties:
+- compatible:	Should be as "apm, xgene-slimpro-mbox".
+
+- reg:		Contain the mailbox register address range.
+
+- interrupts:	7 interrupts must start from 0 to 6, interrupt 0 define the
+		the interrupt for mailbox channel 0 and interrupt 1 for
+		mailbox channel 1 and so likewise for the reminder.
+
+- #mbox-cells:	only one to specify the mailbox channel number.
+
+Example:
+
+Mailbox Node:
+		slimpro-mbox: slimpro-mbox@...40000 {
+			compatible = "apm,xgene-slimpro-mbox";
+			reg = <0x0 0x10540000 0x0 0xa000>;
+			#mbox-cells = <1>;
+			interrupts =  	<0x0 0x0 0x4>,
+					<0x0 0x1 0x4>,
+					<0x0 0x2 0x4>,
+					<0x0 0x3 0x4>,
+					<0x0 0x4 0x4>,
+					<0x0 0x5 0x4>,
+					<0x0 0x6 0x4>,
+		};
-- 
1.9.1

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