[PATCH v16 3/6] ARM: socfpga: add bindings document for fpga bridge drivers
From: <hidden>
Date: 2016-02-05 21:34:10
Also in:
lkml
Subsystem:
fpga manager framework, open firmware and flattened device tree bindings, the rest · Maintainers:
Moritz Fischer, Xu Yilun, Rob Herring, Krzysztof Kozlowski, Conor Dooley, Linus Torvalds
From: Alan Tull <redacted>
Add bindings documentation for Altera SOCFPGA bridges:
* fpga2sdram
* fpga2hps
* hps2fpga
* lwhps2fpga
Signed-off-by: Alan Tull <redacted>
Signed-off-by: Matthew Gerlach <redacted>
Signed-off-by: Dinh Nguyen <redacted>
---
v2: separate into 2 documents for the 2 drivers
v12: bump version to line up with simple-fpga-bus version
remove Linux specific notes such as references to sysfs
move non-DT specific documentation elsewhere
remove bindings that would have been used to pass configuration
clean up formatting
v13: Remove 'label' property
Change property from init-val to bridge-enable
Fix email address
v14: Add resets
Change order of bridges to put lw bridge (controlling bridge) first
v15: No change in this patch for v15 of this patch set
v16: Added regs property, cleaned up unit addresses
---
.../bindings/fpga/altera-fpga2sdram-bridge.txt | 15 +++++++
.../bindings/fpga/altera-hps2fpga-bridge.txt | 47 ++++++++++++++++++++
2 files changed, 62 insertions(+)
create mode 100644 Documentation/devicetree/bindings/fpga/altera-fpga2sdram-bridge.txt
create mode 100644 Documentation/devicetree/bindings/fpga/altera-hps2fpga-bridge.txt
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 0000000..4479a79
--- /dev/null
+++ b/Documentation/devicetree/bindings/fpga/altera-fpga2sdram-bridge.txt@@ -0,0 +1,15 @@ +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: + fpga2sdram_br { + compatible = "altr,socfpga-fpga2sdram-bridge"; + 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 0000000..e6b7474
--- /dev/null
+++ b/Documentation/devicetree/bindings/fpga/altera-hps2fpga-bridge.txt@@ -0,0 +1,47 @@ +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" +- reset-names : Should contain one of: + "lwhps2fpga", + "hps2fpga", or + "fpga2hps" +- resets : Phandle and reset specifier for the reset listed in + reset-names +- 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: + hps_fpgabridge0: fpgabridge@ff400000 { + compatible = "altr,socfpga-lwhps2fpga-bridge"; + reg = <0xff400000 0x100000>; + resets = <&rst LWHPS2FPGA_RESET>; + reset-names = "lwhps2fpga"; + clocks = <&l4_main_clk>; + bridge-enable = <0>; + }; + + hps_fpgabridge1: fpgabridge@ff500000 { + compatible = "altr,socfpga-hps2fpga-bridge"; + reg = <0xff500000 0x10000>; + resets = <&rst HPS2FPGA_RESET>; + reset-names = "hps2fpga"; + clocks = <&l4_main_clk>; + bridge-enable = <1>; + }; + + hps_fpgabridge2: fpgabridge@ff600000 { + compatible = "altr,socfpga-fpga2hps-bridge"; + reg = <0xff600000 0x100000>; + resets = <&rst FPGA2HPS_RESET>; + reset-names = "fpga2hps"; + clocks = <&l4_main_clk>; + };
--
1.7.9.5