linux-kernel - [PATCH 3/3] dt-bindings: display: Add Mayqueen Pixpaper e-ink panel

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Message-Id: <20250708-drm-v1-3-45055fdadc8a@gmail.com>
Date: Tue, 08 Jul 2025 18:06:46 +0800
From: LiangCheng Wang <zaq14760@...il.com>
To: Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, 
 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>, 
 Sumit Semwal <sumit.semwal@...aro.org>, 
 Christian König <christian.koenig@....com>, 
 Wig Cheng <onlywig@...il.com>
Cc: devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, 
 dri-devel@...ts.freedesktop.org, linux-media@...r.kernel.org, 
 linaro-mm-sig@...ts.linaro.org, LiangCheng Wang <zaq14760@...il.com>
Subject: [PATCH 3/3] dt-bindings: display: Add Mayqueen Pixpaper e-ink
 panel

The binding is for the Mayqueen Pixpaper e-ink display panel,
controlled via an SPI interface.

Signed-off-by: LiangCheng Wang <zaq14760@...il.com>
---
 .../bindings/display/mayqueen,pixpaper.yaml        | 63 ++++++++++++++++++++++
 1 file changed, 63 insertions(+)

diff --git a/Documentation/devicetree/bindings/display/mayqueen,pixpaper.yaml b/Documentation/devicetree/bindings/display/mayqueen,pixpaper.yaml
new file mode 100644
index 0000000000000000000000000000000000000000..cd27f8ba5ae1d94660818525b5fa71db98c8acb7
--- /dev/null
+++ b/Documentation/devicetree/bindings/display/mayqueen,pixpaper.yaml
@@ -0,0 +1,63 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/display/mayqueen,pixpaper.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Mayqueen Pixpaper e-ink display panel
+
+maintainers:
+  - LiangCheng Wang <zaq14760@...il.com>
+
+description:
+  The Pixpaper is an e-ink display panel controlled via an SPI interface.
+  The panel has a resolution of 122x250 pixels and requires GPIO pins for
+  reset, busy, and data/command control.
+
+allOf:
+  - $ref: /schemas/spi/spi-peripheral-props.yaml#
+
+properties:
+  compatible:
+    const: mayqueen,pixpaper
+
+  reg:
+    maxItems: 1
+
+  spi-max-frequency:
+    maximum: 1000000
+    default: 1000000
+
+  reset-gpios:
+    maxItems: 1
+
+  busy-gpios:
+    maxItems: 1
+
+  dc-gpios:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+  - reset-gpios
+  - busy-gpios
+  - dc-gpios
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+    spi {
+        #address-cells = <1>;
+        #size-cells = <0>;
+        display@0 {
+            compatible = "mayqueen,pixpaper";
+            reg = <0>;
+            spi-max-frequency = <1000000>;
+            reset-gpios = <&gpio1 17 GPIO_ACTIVE_HIGH>;
+            busy-gpios = <&gpio1 18 GPIO_ACTIVE_HIGH>;
+            dc-gpios = <&gpio1 19 GPIO_ACTIVE_HIGH>;
+        };
+    };

-- 
2.34.1