linux-kernel - [PATCH v5 1/3] dt-bindings: display: Add Sitronix ST7571 LCD Controller

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Message-Id: <20250423-st7571-v5-1-a283b752ad39@gmail.com>
Date: Wed, 23 Apr 2025 09:13:33 +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>, 
 Conor Dooley <conor.dooley@...rochip.com>, 
 Javier Martinez Canillas <javierm@...hat.com>, 
 Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Subject: [PATCH v5 1/3] dt-bindings: display: Add Sitronix ST7571 LCD
 Controller

Sitronix ST7571 is a dot matrix LCD controller supporting
both 4bit grayscale and monochrome LCDs.

Reviewed-by: Conor Dooley <conor.dooley@...rochip.com>
Reviewed-by: Javier Martinez Canillas <javierm@...hat.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Signed-off-by: Marcus Folkesson <marcus.folkesson@...il.com>
---
 .../bindings/display/sitronix,st7571.yaml          | 73 ++++++++++++++++++++++
 1 file changed, 73 insertions(+)

diff --git a/Documentation/devicetree/bindings/display/sitronix,st7571.yaml b/Documentation/devicetree/bindings/display/sitronix,st7571.yaml
new file mode 100644
index 0000000000000000000000000000000000000000..4fea782fccd701f5095a08290c13722a12a58b52
--- /dev/null
+++ b/Documentation/devicetree/bindings/display/sitronix,st7571.yaml
@@ -0,0 +1,73 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/display/sitronix,st7571.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Sitronix ST7571 Display Controller
+
+maintainers:
+  - Marcus Folkesson <marcus.folkesson@...il.com>
+
+description:
+  Sitronix ST7571 is a driver and controller for 4-level gray
+  scale and monochrome dot matrix LCD panels.
+
+allOf:
+  - $ref: panel/panel-common.yaml#
+
+properties:
+  compatible:
+    const: sitronix,st7571
+
+  reg:
+    maxItems: 1
+
+  sitronix,grayscale:
+    type: boolean
+    description:
+      Display supports 4-level grayscale.
+
+  reset-gpios: true
+  width-mm: true
+  height-mm: true
+  panel-timing: true
+
+required:
+  - compatible
+  - reg
+  - reset-gpios
+  - width-mm
+  - height-mm
+  - panel-timing
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+
+    i2c {
+      #address-cells = <1>;
+      #size-cells = <0>;
+
+      display@3f {
+        compatible = "sitronix,st7571";
+        reg = <0x3f>;
+        reset-gpios = <&gpio0 3 GPIO_ACTIVE_LOW>;
+        width-mm = <37>;
+        height-mm = <27>;
+
+        panel-timing {
+          hactive = <128>;
+          vactive = <96>;
+          hback-porch = <0>;
+          vback-porch = <0>;
+          clock-frequency = <0>;
+          hfront-porch = <0>;
+          hsync-len = <0>;
+          vfront-porch = <0>;
+          vsync-len = <0>;
+        };
+      };
+    };

-- 
2.49.0