summaryrefslogtreecommitdiff
path: root/Documentation/devicetree/bindings/fpga
diff options
context:
space:
mode:
authorAlan Tull <atull@opensource.altera.com>2016-07-12 14:36:41 -0500
committerRob Herring <robh@kernel.org>2016-11-18 11:55:17 -0600
commite3d19244c84319a7a7befc7965bbe6e6f8962a2f (patch)
tree479c852d6f9730a8605642c0814df1fe1597d12b /Documentation/devicetree/bindings/fpga
parente5269794d2e9046dd45be15bdb213a229df46b7e (diff)
ARM: socfpga: add bindings document for fpga bridge drivers
Add bindings documentation for Altera SOCFPGA bridges: * fpga2sdram * fpga2hps * hps2fpga * lwhps2fpga Signed-off-by: Alan Tull <atull@opensource.altera.com> Signed-off-by: Matthew Gerlach <mgerlach@altera.com> Signed-off-by: Dinh Nguyen <dinguyen@opensource.altera.com> Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Rob Herring <robh@kernel.org>
Diffstat (limited to 'Documentation/devicetree/bindings/fpga')
-rw-r--r--Documentation/devicetree/bindings/fpga/altera-fpga2sdram-bridge.txt16
-rw-r--r--Documentation/devicetree/bindings/fpga/altera-hps2fpga-bridge.txt39
2 files changed, 55 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/fpga/altera-fpga2sdram-bridge.txt b/Documentation/devicetree/bindings/fpga/altera-fpga2sdram-bridge.txt
new file mode 100644
index 000000000000..817a8d4bf903
--- /dev/null
+++ b/Documentation/devicetree/bindings/fpga/altera-fpga2sdram-bridge.txt
@@ -0,0 +1,16 @@
+Altera FPGA To SDRAM Bridge Driver
+
+Required properties:
+- compatible : Should contain "altr,socfpga-fpga2sdram-bridge"
+
+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:
+ fpga_bridge3: fpga-bridge@ffc25080 {
+ compatible = "altr,socfpga-fpga2sdram-bridge";
+ reg = <0xffc25080 0x4>;
+ bridge-enable = <0>;
+ };
diff --git a/Documentation/devicetree/bindings/fpga/altera-hps2fpga-bridge.txt b/Documentation/devicetree/bindings/fpga/altera-hps2fpga-bridge.txt
new file mode 100644
index 000000000000..6406f9337eeb
--- /dev/null
+++ b/Documentation/devicetree/bindings/fpga/altera-hps2fpga-bridge.txt
@@ -0,0 +1,39 @@
+Altera FPGA/HPS Bridge Driver
+
+Required properties:
+- regs : base address and size for AXI bridge module
+- compatible : Should contain one of:
+ "altr,socfpga-lwhps2fpga-bridge",
+ "altr,socfpga-hps2fpga-bridge", or
+ "altr,socfpga-fpga2hps-bridge"
+- resets : Phandle and reset specifier for this bridge's reset
+- clocks : Clocks used by this 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 its current state.
+
+Example:
+ fpga_bridge0: fpga-bridge@ff400000 {
+ compatible = "altr,socfpga-lwhps2fpga-bridge";
+ reg = <0xff400000 0x100000>;
+ resets = <&rst LWHPS2FPGA_RESET>;
+ clocks = <&l4_main_clk>;
+ bridge-enable = <0>;
+ };
+
+ fpga_bridge1: fpga-bridge@ff500000 {
+ compatible = "altr,socfpga-hps2fpga-bridge";
+ reg = <0xff500000 0x10000>;
+ resets = <&rst HPS2FPGA_RESET>;
+ clocks = <&l4_main_clk>;
+ bridge-enable = <1>;
+ };
+
+ fpga_bridge2: fpga-bridge@ff600000 {
+ compatible = "altr,socfpga-fpga2hps-bridge";
+ reg = <0xff600000 0x100000>;
+ resets = <&rst FPGA2HPS_RESET>;
+ clocks = <&l4_main_clk>;
+ };