1Technologic Systems NBUS 2 3The NBUS is a bus used to interface with peripherals in the Technologic 4Systems FPGA on the TS-4600 SoM. 5 6Required 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 18Child nodes: 19 20The NBUS node can contain zero or more child nodes representing peripherals 21on the bus. 22 23Example: 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 }; 51