Add binding documentation for the Technologic Systems NBUS that is used
to interface with peripherals in the FPGA of the TS-4600 SoM.
Signed-off-by: Sebastien Bourdelin <sebastien.bourdelin@xxxxxxxxxxxxxxxxxxxx>
---
Changes v2 -> v3:
- rebase on master
- fix typo (suggested by Rob Herring)
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)
---
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..905600adfb64
--- /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
+ - 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 = "...";
+
+ /* ... */
+ };
+ };
--
2.12.0
--
To unsubscribe from this list: send the line "unsubscribe devicetree" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
