[PATCH v3 1/2] dt-bindings: display: mayqueen,pixpaper: add pixpaper-426m

[LiangCheng Wang <zaq14760@gmail.com>]

Add the compatible string for the PIXPAPER 4.26 monochrome
e-ink panel to the Mayqueen Pixpaper binding.

The new panel uses the same SPI and GPIO properties as the
existing Pixpaper panel, but it is not software-compatible with
it. The 4.26-inch panel requires different panel-specific
initialization and update command sequences, so use a distinct
compatible string.

Document the new compatible string and update the binding
description accordingly.

Signed-off-by: LiangCheng Wang <zaq14760@gmail.com>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
---
 .../devicetree/bindings/display/mayqueen,pixpaper.yaml      | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

diff --git a/Documentation/devicetree/bindings/display/mayqueen,pixpaper.yaml b/Documentation/devicetree/bindings/display/mayqueen,pixpaper.yaml
index cd27f8ba5ae1d94660818525b5fa71db98c8acb7..68a6157114604a8308259191e55d1e2d15d76c11 100644
--- a/Documentation/devicetree/bindings/display/mayqueen,pixpaper.yaml
+++ b/Documentation/devicetree/bindings/display/mayqueen,pixpaper.yaml
@@ -4,22 +4,25 @@
 $id: http://devicetree.org/schemas/display/mayqueen,pixpaper.yaml#
 $schema: http://devicetree.org/meta-schemas/core.yaml#
 
-title: Mayqueen Pixpaper e-ink display panel
+title: Mayqueen Pixpaper e-ink display panels
 
 maintainers:
   - LiangCheng Wang <zaq14760@gmail.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.
+  Mayqueen Pixpaper e-ink display panels are controlled via an SPI interface
+  and require GPIO pins for reset, busy, and data/command control. Different
+  panel models use model-specific command sequences selected via their
+  compatible strings.
 
 allOf:
   - $ref: /schemas/spi/spi-peripheral-props.yaml#
 
 properties:
   compatible:
-    const: mayqueen,pixpaper
+    enum:
+      - mayqueen,pixpaper
+      - mayqueen,pixpaper-426m
 
   reg:
     maxItems: 1

-- 
2.34.1