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