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diff --git a/Documentation/devicetree/bindings/bus/ts-nbus.txt b/Documentation/devicetree/bindings/bus/ts-nbus.txt
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+Technologic Systems NBUS
+
+The NBUS is a bus used to interface with peripherals in the Technologic
+Systems FPGA on the TS-4600 SoM.
+
+Required properties :
+ - compatible           : "technologic,ts-nbus"
+ - #address-cells       : must be 1
+ - #size-cells          : must be 0
+ - pwms                 : The PWM bound to the FPGA
+ - ts,data-gpios        : The 8 GPIO pins connected to the data lines on the FPGA
+ - ts,csn-gpios         : The GPIO pin connected to the csn line on the FPGA
+ - ts,txrx-gpios        : The GPIO pin connected to the txrx line on the FPGA
+ - ts,strobe-gpios      : The GPIO pin connected to the stobe line on the FPGA
+ - ts,ale-gpios         : The GPIO pin connected to the ale line on the FPGA
+ - ts,rdy-gpios         : The GPIO pin connected to the rdy line on the FPGA
+
+Child nodes:
+
+The NBUS node can contain zero or more child nodes representing peripherals
+on the bus.
+
+Example:
+
+        nbus {
+                compatible = "technologic,ts-nbus";
+                pinctrl-0 = <&nbus_pins>;
+                #address-cells = <1>;
+                #size-cells = <0>;
+                pwms = <&pwm 2 83>;
+                ts,data-gpios   = <&gpio0 0 GPIO_ACTIVE_HIGH
+                                   &gpio0 1 GPIO_ACTIVE_HIGH
+                                   &gpio0 2 GPIO_ACTIVE_HIGH
+                                   &gpio0 3 GPIO_ACTIVE_HIGH
+                                   &gpio0 4 GPIO_ACTIVE_HIGH
+                                   &gpio0 5 GPIO_ACTIVE_HIGH
+                                   &gpio0 6 GPIO_ACTIVE_HIGH
+                                   &gpio0 7 GPIO_ACTIVE_HIGH>;
+                ts,csn-gpios    = <&gpio0 16 GPIO_ACTIVE_HIGH>;
+                ts,txrx-gpios   = <&gpio0 24 GPIO_ACTIVE_HIGH>;
+                ts,strobe-gpios = <&gpio0 25 GPIO_ACTIVE_HIGH>;
+                ts,ale-gpios    = <&gpio0 26 GPIO_ACTIVE_HIGH>;
+                ts,rdy-gpios    = <&gpio0 21 GPIO_ACTIVE_HIGH>;
+
+                watchdog@2a {
+                        compatible = "...";
+
+                        /* ... */
+                };
+        };