dts: bindings: display: add HUB12 LED matrix binding
Add device tree binding for HUB12 interface monochrome LED matrix
displays (32x16 pixels).
The HUB12 interface uses SPI for data transfer to shift registers,
with additional GPIO pins for row address selection (PA, PB),
output enable (PE), and data latching (PLAT).
Signed-off-by: Siratul Islam <sirat4757@gmail.com>
diff --git a/dts/bindings/display/zephyr,hub12.yaml b/dts/bindings/display/zephyr,hub12.yaml
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+++ b/dts/bindings/display/zephyr,hub12.yaml
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+# Copyright (c) 2025 Siratul Islam <sirat4757@gmail.com>
+# SPDX-License-Identifier: Apache-2.0
+
+description: |
+ HUB12 interface monochrome LED matrix display controller.
+
+ HUB12 is a standard interface for controlling monochrome LED matrix panels
+ using shift registers. It works with any panel implementing the HUB12 protocol.
+
+ This driver uses SPI for serial data transfer to the shift registers,
+ plus additional GPIO pins for row address selection (PA, PB),
+ output enable (PE), and data latching (PLAT).
+
+ See:
+ - https://www.auselectronicsdirect.com.au/assets/files/TA0094%20and%20TA0095%20user%20manual.pdf
+ - https://www.researchgate.net/publication/377952697_Light_Emitting_Diode_LED_Matrix_Display_Board#pf7
+ - https://buildcircuits.com/blogs/scoreduino-modules/exploring-led-display-interfaces-from-hub75-to-spi-and-beyond
+ - https://www.iled.com/class/INNOVAEditor/assets/YeniDatasheets/2120-2124p10tekrenk.pdf
+
+compatible: "zephyr,hub12"
+
+include: [spi-device.yaml, display-controller.yaml]
+
+properties:
+ pa-gpios:
+ type: phandle-array
+ required: true
+ description: Row address bit 0
+
+ pb-gpios:
+ type: phandle-array
+ required: true
+ description: Row address bit 1
+
+ pe-gpios:
+ type: phandle-array
+ required: true
+ description: Output enable control
+
+ plat-gpios:
+ type: phandle-array
+ required: true
+ description: Shift register latch
+
+ width:
+ type: int
+ required: true
+ enum:
+ - 32
+ description: |
+ Display width in pixels. Must match the physical hardware panel.
+ Currently only single 32-pixel wide panels are supported.
+
+ height:
+ type: int
+ required: true
+ enum:
+ - 16
+ description: |
+ Display height in pixels. Must match the physical hardware panel.
+ Standard HUB12 P10 panels are 16 pixels tall.
