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 = "...";

/* ... */

};

};