Messages in this thread Patch in this message | | | From | Christoph Winklhofer <> | Subject | [PATCH v1 1/2] dt-bindings: w1: UART 1-wire bus | Date | Thu, 21 Dec 2023 07:50:47 +0100 |
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Add device tree binding for UART 1-wire bus.
Signed-off-by: Christoph Winklhofer <cj.winklhofer@gmail.com> --- .../devicetree/bindings/w1/w1-uart.yaml | 44 +++++++++++++++++++ 1 file changed, 44 insertions(+) create mode 100644 Documentation/devicetree/bindings/w1/w1-uart.yaml
diff --git a/Documentation/devicetree/bindings/w1/w1-uart.yaml b/Documentation/devicetree/bindings/w1/w1-uart.yaml new file mode 100644 index 000000000000..93d83c42c407 --- /dev/null +++ b/Documentation/devicetree/bindings/w1/w1-uart.yaml @@ -0,0 +1,44 @@ +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/w1/w1-uart.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: UART 1-Wire Bus + +maintainers: + - Christoph Winklhofer <cj.winklhofer@gmail.com> + +description: | + UART 1-wire bus. Utilizes the UART interface via the Serial Device Bus + to create the 1-Wire timing patterns. + + The UART peripheral must support full-duplex and operate in open-drain + mode. The timing patterns are generated by a specific combination of + baud-rate and transmitted byte, which corresponds to a 1-Wire read bit, + write bit or reset pulse. + + The default baud-rate for reset and presence detection is 9600 and for + a 1-Wire read or write operation 115200. In case the actual baud-rate + is different from the requested one, the transmitted byte is adapted + to generate the 1-Wire timing patterns. + + https://www.analog.com/en/technical-articles/using-a-uart-to-implement-a-1wire-bus-master.html + + +properties: + compatible: + const: w1-uart + +required: + - compatible + +additionalProperties: false + +examples: + - | + serial { + onewire { + compatible = "w1-uart"; + }; + }; -- 2.43.0
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