1. Patchew
  2. linux
  3. [PATCHv3 0/4] Wiegand bus driver and GPIO bitbanged controller
  4. View patch

[PATCHv3 3/4] dt-bindings: wiegand: add GPIO bitbanged Wiegand controller

Martin Zaťovič posted 4 patches 2 years, 11 months ago
There is a newer version of this series
[PATCHv3 3/4] dt-bindings: wiegand: add GPIO bitbanged Wiegand controller
Posted by Martin Zaťovič 2 years, 11 months ago 
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@linaro.org>
Signed-off-by: Martin Zaťovič <m.zatovic1@gmail.com>
---
 .../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@gmail.com>
+
+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
+
+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@gmail.com>
+S:	Maintained
+F:	Documentation/devicetree/bindings/wiegand/wiegand-gpio.yaml
+
 WIIMOTE HID DRIVER
 M:	David Rheinsberg <david.rheinsberg@gmail.com>
 L:	linux-input@vger.kernel.org
-- 
2.39.2
Re: [PATCHv3 3/4] dt-bindings: wiegand: add GPIO bitbanged Wiegand controller
Posted by Evgeny Boger 2 years, 11 months ago 
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@linaro.org>
> Signed-off-by: Martin Zaťovič <m.zatovic1@gmail.com>
> ---
>   .../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@gmail.com>
> +
> +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@gmail.com>
> +S:	Maintained
> +F:	Documentation/devicetree/bindings/wiegand/wiegand-gpio.yaml
> +
>   WIIMOTE HID DRIVER
>   M:	David Rheinsberg <david.rheinsberg@gmail.com>
>   L:	linux-input@vger.kernel.org

-- 
Kind regards,
Evgeny Boger
CTO @ Wiren Board

Patchew 2.1-devel-b67e4c2

© 2016 - 2026 Red Hat, Inc.