From: Alan Tull <at...@opensource.altera.com>
New bindings document for simple fpga bus.
Signed-off-by: Alan Tull <at...@opensource.altera.com>
---
v9: initial version added to this patchset
v10: s/fpga/FPGA/g
replace DT overlay example with slightly more complicated example
move to staging/simple-fpga-bus
v11: No change in this patch for v11 of the patch set
v12: Moved out of staging.
Changed to use FPGA bridges framework instead of resets
for bridges.
v13: bridge@0xff20000 -> bridge@ff200000, etc
Leave out directly talking about overlays
Remove regs and clocks directly under simple-fpga-bus in example
Use common "firmware-name" binding instead of "fpga-firmware"
---
.../devicetree/bindings/fpga/simple-fpga-bus.txt | 74 ++++++++++++++++++++++
1 file changed, 74 insertions(+)
create mode 100644 Documentation/devicetree/bindings/fpga/simple-fpga-bus.txt
diff --git a/Documentation/devicetree/bindings/fpga/simple-fpga-bus.txt
b/Documentation/devicetree/bindings/fpga/simple-fpga-bus.txt
new file mode 100644
index 0000000..9646c09
--- /dev/null
+++ b/Documentation/devicetree/bindings/fpga/simple-fpga-bus.txt
@@ -0,0 +1,74 @@
+Simple FPGA Bus
+===============
+
+A Simple FPGA Bus is a bus that handles configuring an FPGA and its bridges
+before populating the devices below its node.
+
+Required properties:
+- compatible : should contain "simple-fpga-bus"
+- #address-cells, #size-cells, ranges: must be present to handle address space
+ mapping for children.
+
+Optional properties:
+- fpga-mgr : should contain a phandle to a FPGA manager.
+- fpga-firmware : should contain the name of a FPGA image file located on the
+ firmware search path.
+- partial-reconfig : boolean property should be defined if partial
+ reconfiguration of the FPGA is to be done, otherwise full reconfiguration
+ is done.
+- fpga-bridges : should contain a list of bridges that the bus will disable
+ before programming the FPGA and then enable after the FPGA has been
+ programmed.
+
+Example:
+
+/dts-v1/;
+/plugin/;
+/ {
+ fragment@0 {
+ target-path="/soc";
+ __overlay__ {
+ #address-cells = <1>;
+ #size-cells = <1>;
+
+ bridge@ff200000 {
+ compatible = "simple-fpga-bus";
+
+ #address-cells = <0x2>;
+ #size-cells = <0x1>;
+
+ ranges = <0x00000000 0x00000000 0xc0000000
0x00010000>,
+ <0x00000001 0x00020000 0xff220000
0x00000008>,
+ <0x00000001 0x00010040 0xff210040
0x00000020>;
+
+ fpga-mgr = <&hps_0_fpgamgr>;
+ firmware-name = "soc_system.rbf";
+
+ fpga-bridges = <&hps_fpgabridge0>,
<&hps_fpgabridge1>, <&hps_fpgabridge2>;
+
+ onchip_memory2_0: memory@000000000 {
+ device_type = "memory";
+ compatible = "ALTR,onchipmem-15.1";
+ reg = <0x00000000 0x00000000
0x00010000>;
+ };
+
+ jtag_uart: serial@100020000 {
+ compatible = "altr,juart-15.1",
"altr,juart-1.0";
+ reg = <0x00000001 0x00020000
0x00000008>;
+ interrupt-parent = <&intc>;
+ interrupts = <0 42 4>;
+ };
+
+ led_pio: gpio@100010040 {
+ compatible = "altr,pio-15.1",
"altr,pio-1.0";
+ reg = <0x00000001 0x00010040
0x00000020>;
+ altr,gpio-bank-width = <4>;
+ resetvalue = <0>;
+ #gpio-cells = <2>;
+ gpio-controller;
+ };
+ };
+ };
+ };
+};
+
--
1.9.1
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