The ili9882t touch screen chip same as Elan eKTH6915 controller has a reset gpio. The difference is that ili9882t needs to use vccio-supply instead of vcc33-supply. Doug's series[1] allows panels and touchscreens to power on/off together, let's add a phandle for this. [1]: https: //lore.kernel.org/all/20230523193017.4109557-1-dianders@xxxxxxxxxxxx/ Signed-off-by: Cong Yang <yangcong5@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx> --- .../bindings/input/ilitek,ili9882t.yaml | 67 +++++++++++++++++++ 1 file changed, 67 insertions(+) create mode 100644 Documentation/devicetree/bindings/input/ilitek,ili9882t.yaml diff --git a/Documentation/devicetree/bindings/input/ilitek,ili9882t.yaml b/Documentation/devicetree/bindings/input/ilitek,ili9882t.yaml new file mode 100644 index 000000000000..f69fa3aaf4c5 --- /dev/null +++ b/Documentation/devicetree/bindings/input/ilitek,ili9882t.yaml @@ -0,0 +1,67 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/input/ilitek,ili9882t.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Ilitek ili9882t touchscreen controller + +maintainers: + - Dmitry Torokhov <dmitry.torokhov@xxxxxxxxx> + +description: + Supports the Ilitek ili9882t touchscreen controller. + This touchscreen controller uses the i2c-hid protocol with a reset GPIO. + +properties: + compatible: + items: + - const: ilitek,ili9882t + + reg: + const: 0x41 + + interrupts: + maxItems: 1 + + panel: + description: If this is a touchscreen, the panel it's connected to. This + indicates that the panel and touchscreen are expected to be power + sequenced together. + $ref: /schemas/types.yaml#/definitions/phandle + + reset-gpios: + description: Reset GPIO. + + + vccio-supply: + description: The 1.8V supply to the touchscreen. + +required: + - compatible + - reg + - interrupts + - vccio-supply + +additionalProperties: false + +examples: + - | + #include <dt-bindings/gpio/gpio.h> + #include <dt-bindings/interrupt-controller/irq.h> + + i2c { + #address-cells = <1>; + #size-cells = <0>; + + touchscreen: touchscreen@41 { + compatible = "ilitek,ili9882t"; + reg = <0x41>; + + interrupt-parent = <&pio>; + interrupts = <12 IRQ_TYPE_LEVEL_LOW>; + + reset-gpios = <&pio 60 GPIO_ACTIVE_LOW>; + vccio-supply = <&mt6366_vio18_reg>; + }; + }; -- 2.25.1
