On Fri, Feb 03, 2017 at 02:47:26PM -0500, Sebastien Bourdelin wrote:
> Add binding documentation for the Technologic Systems NBUS that is used
> to interface with peripherals in the FPGA of the TS-4600 SoM.
>
> ---
> Changes v1 -> v2:
> - rebase on master
> - remove the simple-bus compatibility as the root node will now
> populate child nodes (suggested by Rob Herring)
> - use the ts vendor prefix for gpios (suggested by Rob Herring)
>
> Signed-off-by: Sebastien Bourdelin <[email protected]>
> ---
> Documentation/devicetree/bindings/bus/ts-nbus.txt | 50
> +++++++++++++++++++++++
> 1 file changed, 50 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/bus/ts-nbus.txt
>
> diff --git a/Documentation/devicetree/bindings/bus/ts-nbus.txt
> b/Documentation/devicetree/bindings/bus/ts-nbus.txt
> new file mode 100644
> index 000000000000..c8a1f2cbe6a0
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/bus/ts-nbus.txt
> @@ -0,0 +1,50 @@
> +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
> + - pws : The PWM binded to the FPGA
Should be pwms?
s/binded/bound/
> + - data-gpios : The GPIO pin connected to the data line on the FPGA
lines? How many? Always 8 like the example?
> + - csn-gpios : The GPIO pin connected to the csn line on the FPGA
> + - txrx-gpios : The GPIO pin connected to the txrx line on the FPGA
> + - strobe-gpios : The GPIO pin connected to the stobe line on the FPGA
> + - ale-gpios : The GPIO pin connected to the ale line on the FPGA
> + - 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 = "...";
> +
> + /* ... */
> + };
> + };
> --
> 2.11.0
>
