linux-kernel - [PATCH 1/3] dt-bindings: st7571-i2c: Add Sitronix ST7571 panel bindings

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Message-Id: <20250402-st7571-v1-1-351d6b9eeb4a@gmail.com>
Date: Wed, 02 Apr 2025 08:12:10 +0200
From: Marcus Folkesson <marcus.folkesson@...il.com>
To: David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>, 
 Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>, 
 Maxime Ripard <mripard@...nel.org>, Thomas Zimmermann <tzimmermann@...e.de>, 
 Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>
Cc: dri-devel@...ts.freedesktop.org, devicetree@...r.kernel.org, 
 linux-kernel@...r.kernel.org, Marcus Folkesson <marcus.folkesson@...il.com>
Subject: [PATCH 1/3] dt-bindings: st7571-i2c: Add Sitronix ST7571 panel
 bindings

Sitronix ST7571 is a 4bit gray scale dot matrix LCD controller.
The controller has a SPI, I2C and 8bit parallel interface, this is for
the I2C interface only.

Signed-off-by: Marcus Folkesson <marcus.folkesson@...il.com>
---
 .../bindings/display/sitronix,st7571-i2c.yaml      | 71 ++++++++++++++++++++++
 1 file changed, 71 insertions(+)

diff --git a/Documentation/devicetree/bindings/display/sitronix,st7571-i2c.yaml b/Documentation/devicetree/bindings/display/sitronix,st7571-i2c.yaml
new file mode 100644
index 0000000000000000000000000000000000000000..6e5e0994a98db646a37bb17c4289332546c9266e
--- /dev/null
+++ b/Documentation/devicetree/bindings/display/sitronix,st7571-i2c.yaml
@@ -0,0 +1,71 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/display/sitronix,st7571-i2c.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Sitronix ST7571 Display Panels
+
+maintainers:
+  - Marcus Folkesson <marcus.folkesson@...il.com>
+
+properties:
+  compatible:
+    const: sitronix,st7571-i2c
+
+  reg:
+    description: I2C address of the LCD controller
+    maxItems: 1
+
+  sitronix,panel-width-mm:
+    description: physical panel width [mm]
+
+  sitronix,panel-height-mm:
+    description: physical panel height [mm]
+
+  sitronix,panel-nlines:
+    description: Number of lines in the panel
+    $ref: /schemas/types.yaml#/definitions/uint32
+    minimum: 1
+    maximum: 128
+    default: 128
+
+  sitronix,panel-start-line:
+    description: Start line of the panel
+    $ref: /schemas/types.yaml#/definitions/uint32
+    minimum: 0
+    maximum: 127
+    default: 0
+
+  reset-gpios:
+    description: GPIO connected to the RST_N signal.
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+  - reset-gpios
+  - sitronix,panel-width-mm
+  - sitronix,panel-height-mm
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+    #
+    i2c {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        display@3f {
+          compatible = "sitronix,st7571-i2c";
+          reg = <0x3f>;
+
+          reset-gpios = <&gpio0 3 GPIO_ACTIVE_HIGH>;
+          sitronix,panel-width-mm = <37>;
+          sitronix,panel-height-mm = <27>;
+          sitronix,panel-nlines = <96>;
+          sitronix,panel-start-line = <0>;
+        };
+    };

-- 
2.48.1