On 3/1/23 17:28, Martin Zaťovič wrote:
GPIO bitbanged Wiegand controller requires definitions of GPIO
lines to be used on top of the common Wiegand properties. Wiegand
utilizes two such lines - D0(low data line) and D1(high data line).
Acked-by: Linus Walleij <linus.walleij@xxxxxxxxxx>
Signed-off-by: Martin Zaťovič <m.zatovic1@xxxxxxxxx>
---
.../bindings/wiegand/wiegand-gpio.yaml | 51 +++++++++++++++++++
MAINTAINERS | 5 ++
2 files changed, 56 insertions(+)
create mode 100644 Documentation/devicetree/bindings/wiegand/wiegand-gpio.yaml
diff --git a/Documentation/devicetree/bindings/wiegand/wiegand-gpio.yaml b/Documentation/devicetree/bindings/wiegand/wiegand-gpio.yaml
new file mode 100644
index 000000000000..df28929f6dae
--- /dev/null
+++ b/Documentation/devicetree/bindings/wiegand/wiegand-gpio.yaml
@@ -0,0 +1,51 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/wiegand/wiegand-gpio.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: GPIO bitbanged Wiegand interface devicetree bindings
+
+maintainers:
+ - Martin Zaťovič <m.zatovic1@xxxxxxxxx>
+
+description:
+ This represents the GPIO lines used for bit-banged Wiegand on dedicated GPIO
+ lines.
+
+allOf:
+ - $ref: /schemas/wiegand/wiegand-controller.yaml#
+
+properties:
+ compatible:
+ const: wiegand-gpio
+
+ data-hi-gpios:
+ description: GPIO used as Wiegands data-hi line.
+ maxItems: 1
+
+ data-lo-gpios:
+ description: GPIO used as Wiegands data-lo line.
+ maxItems: 1
+
+required:
+ - compatible
+ - data-hi-gpios
+ - data-lo-gpios
In my experience, the data lines are usually labeled D0/D1, sometimes
DATA0/DATA1. Data high/data low marking is very rare.
+
+unevaluatedProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/gpio/gpio.h>
+
+ wiegand@f00 {
+ compatible = "wiegand-gpio";
+ pulse-len-us = <50>;
+ interval-len-us = <2000>;
+ frame-gap-us = <2000>;
+ data-lo-gpios = <&gpio2 6 (GPIO_ACTIVE_HIGH|GPIO_OPEN_DRAIN)>;
+ data-hi-gpios = <&gpio2 7 (GPIO_ACTIVE_HIGH|GPIO_OPEN_DRAIN)>;
+
+ /* devices */
+ };
diff --git a/MAINTAINERS b/MAINTAINERS
index 23a67b32f095..91e573466d6b 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -22519,6 +22519,11 @@ F: Documentation/devicetree/bindings/wiegand/wiegand-controller.yaml
F: drivers/wiegand/wiegand.c
F: include/linux/wiegand.h
+WIEGAND GPIO BITBANG DRIVER
+M: Martin Zaťovič <m.zatovic1@xxxxxxxxx>
+S: Maintained
+F: Documentation/devicetree/bindings/wiegand/wiegand-gpio.yaml
+
WIIMOTE HID DRIVER
M: David Rheinsberg <david.rheinsberg@xxxxxxxxx>
L: linux-input@xxxxxxxxxxxxxxx
--
Kind regards,
Evgeny Boger
CTO @ Wiren Board
