linux-kernel - [PATCH v4 1/3] dt-bindings: display: sitronix,st7920: Add DT schema

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Message-Id: <20251031-st7920-v4-1-35291f8076b2@gmail.com>
Date: Fri, 31 Oct 2025 10:05:17 +0100
From: Iker Pedrosa <ikerpedrosam@...il.com>
To: Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>, 
 Maxime Ripard <mripard@...nel.org>, Thomas Zimmermann <tzimmermann@...e.de>, 
 David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>, 
 Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, 
 Javier Martinez Canillas <javierm@...hat.com>, 
 Iker Pedrosa <ikerpedrosam@...il.com>
Cc: linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org, 
 devicetree@...r.kernel.org
Subject: [PATCH v4 1/3] dt-bindings: display: sitronix,st7920: Add DT
 schema

Add binding for Sitronix ST7920 display.

Signed-off-by: Iker Pedrosa <ikerpedrosam@...il.com>
---
 .../bindings/display/sitronix,st7920.yaml          | 58 ++++++++++++++++++++++
 1 file changed, 58 insertions(+)

diff --git a/Documentation/devicetree/bindings/display/sitronix,st7920.yaml b/Documentation/devicetree/bindings/display/sitronix,st7920.yaml
new file mode 100644
index 0000000000000000000000000000000000000000..c4f006fc41e1f472939725bd82b86a649f9b3f56
--- /dev/null
+++ b/Documentation/devicetree/bindings/display/sitronix,st7920.yaml
@@ -0,0 +1,58 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/display/sitronix,st7920.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Sitronix ST7920 LCD Display Controllers
+
+maintainers:
+  - Iker Pedrosa <ikerpedrosam@...il.com>
+
+description:
+  The Sitronix ST7920 is a controller for monochrome dot-matrix graphical LCDs,
+  most commonly used for 128x64 pixel displays.
+
+properties:
+  compatible:
+    const: sitronix,st7920
+
+  reg:
+    maxItems: 1
+
+  vdd-supply:
+    description: Regulator that provides 5V Vdd power supply
+
+  reset-gpios:
+    maxItems: 1
+
+  spi-max-frequency:
+    maximum: 600000
+
+required:
+  - compatible
+  - reg
+  - spi-max-frequency
+
+allOf:
+  - $ref: /schemas/spi/spi-peripheral-props.yaml#
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+
+    spi {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        display@0 {
+            compatible = "sitronix,st7920";
+            reg = <0>;
+            vdd-supply = <&reg_5v>;
+            reset-gpios = <&gpio 25 GPIO_ACTIVE_LOW>;
+            spi-max-frequency = <600000>;
+            spi-cs-high;
+        };
+    };

-- 
2.51.0