From: Alan Tull <atull@xxxxxxxxxxxxxxxxxxxxx>
New bindings document for simple fpga bus.
Signed-off-by: Alan Tull <atull@xxxxxxxxxxxxxxxxxxxxx>
---
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
---
.../Documentation/bindings/simple-fpga-bus.txt | 83 ++++++++++++++++++++
1 file changed, 83 insertions(+)
create mode 100644 drivers/staging/simple-fpga-bus/Documentation/bindings/simple-fpga-bus.txt
diff --git a/drivers/staging/simple-fpga-bus/Documentation/bindings/simple-fpga-bus.txt b/drivers/staging/simple-fpga-bus/Documentation/bindings/simple-fpga-bus.txt
new file mode 100644
index 0000000..5a55fb2
--- /dev/null
+++ b/drivers/staging/simple-fpga-bus/Documentation/bindings/simple-fpga-bus.txt
@@ -0,0 +1,83 @@
+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. All this happens when a device
+tree overlay is added to the live tree. This document describes that device
+tree overlay.
+
+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 is to be done.
+- resets : should contain a list of resets that the bus will assert before
+ programming the FPGA and then deassert after the FPGA has been programmed
+ i.e. FPGA bridges.
+- reset-names : should contain a list of the names of the resets.
+
+Example:
+
+/dts-v1/;
+/plugin/;
+/ {
+ fragment@0 {
+ target-path="/soc";
+ __overlay__ {
+ #address-cells = <1>;
+ #size-cells = <1>;
+
+ bridge@0xff200000 {
+ compatible = "simple-fpga-bus";
+ reg = <0xc0000000 0x20000000>,
+ <0xff200000 0x00200000>;
+ reg-names = "axi_h2f", "axi_h2f_lw";
+
+ #address-cells = <0x2>;
+ #size-cells = <0x1>;
+
+ ranges = <0x00000000 0x00000000 0xc0000000 0x00010000>,
+ <0x00000001 0x00020000 0xff220000 0x00000008>,
+ <0x00000001 0x00010040 0xff210040 0x00000020>;
+
+ clocks = <0x2 0x2>;
+ clock-names = "h2f_lw_axi_clock", "f2h_sdram0_clock";
+
+ fpga-mgr = <&hps_0_fpgamgr>;
+ fpga-firmware = "soc_system.rbf";
+
+ resets = <&hps_fpgabridge0 0>, <&hps_fpgabridge1 0>, <&hps_fpgabridge2 0>;
+ reset-names = "hps2fpga", "lwhps2fpga", "fpga2hps";
+
+ onchip_memory2_0: memory@0x000000000 {
+ device_type = "memory";
+ compatible = "ALTR,onchipmem-15.1";
+ reg = <0x00000000 0x00000000 0x00010000>;
+ };
+
+ jtag_uart: serial@0x100020000 {
+ compatible = "altr,juart-15.1", "altr,juart-1.0";
+ reg = <0x00000001 0x00020000 0x00000008>;
+ interrupt-parent = <&intc>;
+ interrupts = <0 42 4>;
+ };
+
+ led_pio: gpio@0x100010040 {
+ 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;
+ };
+ };
+ };
+ };
+};
+
--
1.7.9.5
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