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@xxxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Matthew Gerlach <mgerlach@xxxxxxxxxxxxxxxxxxxxx>
---
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@100000450 {
+ compatible = "altr,freeze-bridge-controller";
+ regs = <0x1000 0x10>;
+ bridge-enable = <0>;
+ };
--
2.10.1
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