| Tom Rini | 53633a8 | 2024-02-29 12:33:36 -0500 | [diff] [blame] | 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 | }; |