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dt-bindings: Add binding for Ilitek ILI9225 display panels 

This adds a new binding for display panels that use an Ilitek ILI9225
controller.

The "ilitek,ili9225-2.2in-176x220" device listed has no identification
markings whatsoever and an hour of googling turned up nothing, hence the use
of the size and resolution in the name instead of a model name.

An example of this nameless device can be found at:
https://github.com/Nkawu/TFT_22_ILI9225

Signed-off-by: David Lechner <david@lechnology.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Noralf Trønnes <noralf@tronnes.org>
Link: https://patchwork.freedesktop.org/patch/msgid/1511122328-31133-3-git-send-email-david@lechnology.com
This commit is contained in:
David Lechner 2017-11-19 14:12:06 -06:00 committed by Noralf Trønnes
parent 2bade36cae
commit 3fd8d9e00f
1 changed files with 25 additions and 0 deletions
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Documentation/devicetree/bindings/display/ilitek,ili9225.txt Normal file
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Ilitek ILI9225 display panels
This binding is for display panels using an Ilitek ILI9225 controller in SPI
mode.
Required properties:
- compatible: "ilitek,ili9225-2.2in-176x220"
- rs-gpios: Register select signal
- reset-gpios: Reset pin
The node for this driver must be a child node of a SPI controller, hence
all mandatory properties described in ../spi/spi-bus.txt must be specified.
Optional properties:
- rotation: panel rotation in degrees counter clockwise (0,90,180,270)
Example:
display@0{
compatible = "ilitek,ili9225-2.2in-176x220";
reg = <0>;
spi-max-frequency = <12000000>;
rs-gpios = <&gpio0 9 GPIO_ACTIVE_HIGH>;
reset-gpios = <&gpio0 8 GPIO_ACTIVE_HIGH>;
rotation = <270>;
};