1 Technologic Systems NBUS
2
3 The NBUS is a bus used to interface with peripherals in the Technologic
4 Systems FPGA on the TS-4600 SoM.
5
6 Required properties :
7 - compatible : "technologic,ts-nbus"
8 - #address-cells : must be 1
9 - #size-cells : must be 0
10 - pwms : The PWM bound to the FPGA
11 - ts,data-gpios : The 8 GPIO pins connected to the data lines on the FPGA
12 - ts,csn-gpios : The GPIO pin connected to the csn line on the FPGA
13 - ts,txrx-gpios : The GPIO pin connected to the txrx line on the FPGA
14 - ts,strobe-gpios : The GPIO pin connected to the stobe line on the FPGA
15 - ts,ale-gpios : The GPIO pin connected to the ale line on the FPGA
16 - ts,rdy-gpios : The GPIO pin connected to the rdy line on the FPGA
17
18 Child nodes:
19
20 The NBUS node can contain zero or more child nodes representing peripherals
21 on the bus.
22
23 Example:
24
25 nbus {
26 compatible = "technologic,ts-nbus";
27 pinctrl-0 = <&nbus_pins>;
28 #address-cells = <1>;
29 #size-cells = <0>;
30 pwms = <&pwm 2 83>;
31 ts,data-gpios = <&gpio0 0 GPIO_ACTIVE_HIGH
32 &gpio0 1 GPIO_ACTIVE_HIGH
33 &gpio0 2 GPIO_ACTIVE_HIGH
34 &gpio0 3 GPIO_ACTIVE_HIGH
35 &gpio0 4 GPIO_ACTIVE_HIGH
36 &gpio0 5 GPIO_ACTIVE_HIGH
37 &gpio0 6 GPIO_ACTIVE_HIGH
38 &gpio0 7 GPIO_ACTIVE_HIGH>;
39 ts,csn-gpios = <&gpio0 16 GPIO_ACTIVE_HIGH>;
40 ts,txrx-gpios = <&gpio0 24 GPIO_ACTIVE_HIGH>;
41 ts,strobe-gpios = <&gpio0 25 GPIO_ACTIVE_HIGH>;
42 ts,ale-gpios = <&gpio0 26 GPIO_ACTIVE_HIGH>;
43 ts,rdy-gpios = <&gpio0 21 GPIO_ACTIVE_HIGH>;
44
45 watchdog@2a {
46 compatible = "...";
47
48 /* ... */
49 };
50 };
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