Subject: [PATCH v6 2/3] dt-bindings: w1: UART 1-Wire bus

From: Christoph Winklhofer <[email protected]>

Add device tree binding for UART 1-Wire bus.

Reviewed-by: Rob Herring <[email protected]>
Signed-off-by: Christoph Winklhofer <[email protected]>
---
Documentation/devicetree/bindings/w1/w1-uart.yaml | 60 +++++++++++++++++++++++
1 file changed, 60 insertions(+)

diff --git a/Documentation/devicetree/bindings/w1/w1-uart.yaml b/Documentation/devicetree/bindings/w1/w1-uart.yaml
new file mode 100644
index 000000000000..7173820c78f9
--- /dev/null
+++ b/Documentation/devicetree/bindings/w1/w1-uart.yaml
@@ -0,0 +1,60 @@
+# 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 <[email protected]>
+
+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
+
+ reset-bps:
+ default: 9600
+ description:
+ The baud rate for the 1-Wire reset and presence detect.
+
+ write-0-bps:
+ default: 115200
+ description:
+ The baud rate for the 1-Wire write-0 cycle.
+
+ write-1-bps:
+ default: 115200
+ description:
+ The baud rate for the 1-Wire write-1 and read cycle.
+
+required:
+ - compatible
+
+additionalProperties:
+ type: object
+
+examples:
+ - |
+ serial {
+ onewire {
+ compatible = "w1-uart";
+ };
+ };

--
2.43.0



2024-02-12 15:33:15

by Krzysztof Kozlowski

[permalink] [raw]
Subject: Re: (subset) [PATCH v6 2/3] dt-bindings: w1: UART 1-Wire bus


On Fri, 09 Feb 2024 07:22:38 +0100, Christoph Winklhofer wrote:
> Add device tree binding for UART 1-Wire bus.
>
>

Applied, thanks!

[2/3] dt-bindings: w1: UART 1-Wire bus
https://git.kernel.org/krzk/linux-w1/c/56552c1a412fd7cce65d95786ed5f05fe157a714

Best regards,
--
Krzysztof Kozlowski <[email protected]>