linux-kernel - [PATCH v19 03/12] add bindings document for altera freeze bridge

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Message-ID: <20160928182200.15800-4-atull@opensource.altera.com>
Date:   Wed, 28 Sep 2016 13:21:51 -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>,
        "Walter Goossens" <waltergoossens@...e.nl>,
        Michal Simek <michal.simek@...inx.com>,
        Cyril Chemparathy <cyril.chemparathy@...inx.com>,
        Josh Cartwright <joshc@...com>,
        Matthew Gerlach <mgerlach@...nsource.altera.com>,
        Dinh Nguyen <dinguyen@...nsource.altera.com>,
        <devicetree@...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 v19 03/12] 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
---
 .../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..97ecc11
--- /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>;
+	};
-- 
2.9.3