0001 Technologic Systems NBUS
0002
0003 The NBUS is a bus used to interface with peripherals in the Technologic
0004 Systems FPGA on the TS-4600 SoM.
0005
0006 Required properties :
0007 - compatible : "technologic,ts-nbus"
0008 - #address-cells : must be 1
0009 - #size-cells : must be 0
0010 - pwms : The PWM bound to the FPGA
0011 - ts,data-gpios : The 8 GPIO pins connected to the data lines on the FPGA
0012 - ts,csn-gpios : The GPIO pin connected to the csn line on the FPGA
0013 - ts,txrx-gpios : The GPIO pin connected to the txrx line on the FPGA
0014 - ts,strobe-gpios : The GPIO pin connected to the stobe line on the FPGA
0015 - ts,ale-gpios : The GPIO pin connected to the ale line on the FPGA
0016 - ts,rdy-gpios : The GPIO pin connected to the rdy line on the FPGA
0017
0018 Child nodes:
0019
0020 The NBUS node can contain zero or more child nodes representing peripherals
0021 on the bus.
0022
0023 Example:
0024
0025 nbus {
0026 compatible = "technologic,ts-nbus";
0027 pinctrl-0 = <&nbus_pins>;
0028 #address-cells = <1>;
0029 #size-cells = <0>;
0030 pwms = <&pwm 2 83>;
0031 ts,data-gpios = <&gpio0 0 GPIO_ACTIVE_HIGH
0032 &gpio0 1 GPIO_ACTIVE_HIGH
0033 &gpio0 2 GPIO_ACTIVE_HIGH
0034 &gpio0 3 GPIO_ACTIVE_HIGH
0035 &gpio0 4 GPIO_ACTIVE_HIGH
0036 &gpio0 5 GPIO_ACTIVE_HIGH
0037 &gpio0 6 GPIO_ACTIVE_HIGH
0038 &gpio0 7 GPIO_ACTIVE_HIGH>;
0039 ts,csn-gpios = <&gpio0 16 GPIO_ACTIVE_HIGH>;
0040 ts,txrx-gpios = <&gpio0 24 GPIO_ACTIVE_HIGH>;
0041 ts,strobe-gpios = <&gpio0 25 GPIO_ACTIVE_HIGH>;
0042 ts,ale-gpios = <&gpio0 26 GPIO_ACTIVE_HIGH>;
0043 ts,rdy-gpios = <&gpio0 21 GPIO_ACTIVE_HIGH>;
0044
0045 watchdog@2a {
0046 compatible = "...";
0047
0048 /* ... */
0049 };
0050 };
