Bindings/bus/ts-nbus.txt

   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         };