linux-kernel - [PATCHv3 1/4] dt-bindings: wiegand: add Wiegand controller common properties

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Date:   Wed,  1 Mar 2023 15:28:32 +0100
From:   Martin Zaťovič <m.zatovic1@...il.com>
To:     linux-kernel@...r.kernel.org
Cc:     robh+dt@...nel.org, krzysztof.kozlowski+dt@...aro.org,
        gregkh@...uxfoundation.org, airlied@...hat.com, dipenp@...dia.com,
        treding@...dia.com, mwen@...lia.com, fmdefrancesco@...il.com,
        arnd@...db.de, bvanassche@....org, ogabbay@...nel.org,
        axboe@...nel.dk, mathieu.poirier@...aro.org, linux@...y.sk,
        masahiroy@...nel.org, yangyicong@...ilicon.com,
        dan.j.williams@...el.com, jacek.lawrynowicz@...ux.intel.com,
        benjamin.tissoires@...hat.com, devicetree@...r.kernel.org,
        furong.zhou@...ux.intel.com, andriy.shevchenko@...el.com,
        linus.walleij@...aro.org,
        Martin Zaťovič <m.zatovic1@...il.com>
Subject: [PATCHv3 1/4] dt-bindings: wiegand: add Wiegand controller common properties

Wiegand bus is defined by a Wiegand controller node. This node
can contain one or more device nodes for devices attached to
the controller(it is advised to only connect one device as Wiegand
is a point-to-point bus).

Wiegand controller needs to specify several attributes such as
the pulse length in order to function properly. These attributes
are documented here.

Acked-by: Linus Walleij <linus.walleij@...aro.org>
Signed-off-by: Martin Zaťovič <m.zatovic1@...il.com>
---
 .../bindings/wiegand/wiegand-controller.yaml  | 39 +++++++++++++++++++
 MAINTAINERS                                   |  5 +++
 2 files changed, 44 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/wiegand/wiegand-controller.yaml

diff --git a/Documentation/devicetree/bindings/wiegand/wiegand-controller.yaml b/Documentation/devicetree/bindings/wiegand/wiegand-controller.yaml
new file mode 100644
index 000000000000..df985cb3045a
--- /dev/null
+++ b/Documentation/devicetree/bindings/wiegand/wiegand-controller.yaml
@@ -0,0 +1,39 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/wiegand/wiegand-controller.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Wiegand Generic Controller Common Properties
+
+maintainers:
+  - Martin Zaťovič <martin.zatovic@...-biometrics.com>
+
+description:
+  Wiegand busses can be described with a node for the Wiegand controller device
+  and a set of child nodes for each SPI slave on the bus.
+
+properties:
+  $nodename:
+    pattern: "^wiegand(@.*|-[0-9a-f])?$"
+
+  pulse-len-us:
+    description: |
+      Length of the low pulse in microseconds.
+
+  interval-len-us:
+    description: |
+      Length of a whole bit (both the pulse and the high phase) in microseconds.
+
+  frame-gap-us:
+    description: |
+      Length of the last bit of a frame (both the pulse and the high phase) in
+      microseconds.
+
+required:
+  - compatible
+  - pulse-len-us
+  - interval-len-us
+  - frame-gap-us
+
+additionalProperties: true
diff --git a/MAINTAINERS b/MAINTAINERS
index b0db911207ba..1f6f6d236f0c 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -22512,6 +22512,11 @@ L:	linux-rtc@...r.kernel.org
 S:	Maintained
 F:	drivers/rtc/rtc-sd3078.c
 
+WIEGAND BUS DRIVER
+M:	Martin Zaťovič <m.zatovic1@...il.com>
+S:	Maintained
+F:	Documentation/devicetree/bindings/wiegand/wiegand-controller.yaml
+
 WIIMOTE HID DRIVER
 M:	David Rheinsberg <david.rheinsberg@...il.com>
 L:	linux-input@...r.kernel.org
-- 
2.39.2