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Message-ID: <20161017160941.4205-4-atull@opensource.altera.com>
Date: Mon, 17 Oct 2016 11:09:34 -0500
From: Alan Tull <atull@...nsource.altera.com>
To: Rob Herring <robh+dt@...nel.org>
CC: Frank Rowand <frowand.list@...il.com>,
Mark Rutland <mark.rutland@....com>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Moritz Fischer <moritz.fischer@...us.com>,
Ian Campbell <ijc+devicetree@...lion.org.uk>,
Jon Masters <jcm@...hat.com>,
Michal Simek <michal.simek@...inx.com>,
Jonathan Corbet <corbet@....net>,
"Cyril Chemparathy" <cyril.chemparathy@...inx.com>,
Matthew Gerlach <mgerlach@...nsource.altera.com>,
Dinh Nguyen <dinguyen@...nsource.altera.com>,
<devicetree@...r.kernel.org>, <linux-doc@...r.kernel.org>,
<linux-arm-kernel@...ts.infradead.org>,
<linux-kernel@...r.kernel.org>, <delicious.quinoa@...il.com>,
Alan Tull <atull@...nsource.altera.com>
Subject: [PATCH v20 03/10] add bindings document for altera freeze bridge
Add bindings document for the Altera Freeze Bridge. A Freeze
Bridge is used to gate traffic to/from a region of a FPGA
such that that region can be reprogrammed. The Freeze Bridge
exist in FPGA fabric that is not currently being reconfigured.
Signed-off-by: Alan Tull <atull@...nsource.altera.com>
Signed-off-by: Matthew Gerlach <mgerlach@...nsource.altera.com>
---
v19: Added in v19 of patchset, uses fpga image info struct
v20: fix one underscore to hyphen
---
.../bindings/fpga/altera-freeze-bridge.txt | 23 ++++++++++++++++++++++
1 file changed, 23 insertions(+)
create mode 100644 Documentation/devicetree/bindings/fpga/altera-freeze-bridge.txt
diff --git a/Documentation/devicetree/bindings/fpga/altera-freeze-bridge.txt b/Documentation/devicetree/bindings/fpga/altera-freeze-bridge.txt
new file mode 100644
index 0000000..f8e288c7
--- /dev/null
+++ b/Documentation/devicetree/bindings/fpga/altera-freeze-bridge.txt
@@ -0,0 +1,23 @@
+Altera Freeze Bridge Controller Driver
+
+The Altera Freeze Bridge Controller manages one or more freeze bridges.
+The controller can freeze/disable the bridges which prevents signal
+changes from passing through the bridge. The controller can also
+unfreeze/enable the bridges which allows traffic to pass through the
+bridge normally.
+
+Required properties:
+- compatible : Should contain "altr,freeze-bridge-controller"
+- regs : base address and size for freeze bridge module
+
+Optional properties:
+- bridge-enable : 0 if driver should disable bridge at startup
+ 1 if driver should enable bridge at startup
+ Default is to leave bridge in current state.
+
+Example:
+ freeze-controller@...000450 {
+ compatible = "altr,freeze-bridge-controller";
+ regs = <0x1000 0x10>;
+ bridge-enable = <0>;
+ };
--
2.10.1
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