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28 Sep 2016 18:21:55.6382 (UTC) X-MS-Exchange-CrossTenant-Id: fbd72e03-d4a5-4110-adce-614d51f2077a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=fbd72e03-d4a5-4110-adce-614d51f2077a;Ip=[66.35.236.227];Helo=[sj-itexedge03.altera.priv.altera.com] X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: CY1PR0301MB1276 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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>; + }; -- 2.9.3