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X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Mark Rutland , Moritz Fischer , delicious.quinoa@gmail.com, Ian Campbell , Alan Tull , Greg Kroah-Hartman , Josh Cartwright , Michal Simek , linux-kernel@vger.kernel.org, Cyril Chemparathy , devicetree@vger.kernel.org, Dinh Nguyen , Jon Masters , Matthew Gerlach , Frank Rowand , Walter Goossens , linux-arm-kernel@lists.infradead.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP 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 Signed-off-by: Matthew Gerlach --- 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@100000450 { + compatible = "altr,freeze-bridge-controller"; + regs = <0x1000 0x10>; + bridge-enable = <0>; + };