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>
1 file changed