Documentation/devicetree/bindings/input/touchscreen/gt9xx/gt9xx.txt

Goodix GT9xx series touch controller

Required properties:

 - compatible		: Should be "goodix,gt9xx"
 - reg			: I2C slave address of the device.
 - interrupt-parent	: Parent of interrupt.
 - interrupts		: Configuration of touch panel controller interrupt
				GPIO.
 - goodix,product-id	: Product identification of the controller.
 - interrupt-gpios	: Interrupt gpio which is to provide interrupts to
				host, same as "interrupts" node.
 - reset-gpios		: Reset gpio to control the reset of chip.
 - goodix,display-coords	: Display coordinates in pixels. It is a four
				tuple consisting of min x, min y, max x and
				max y values.

Optional properties:

 - avdd-supply		: Power supply needed to power up the device, this is
				for fixed voltage external regulator.
 - vdd-supply		: Power supply needed to power up the device, when use
				external regulator, do not add this property.
 - vcc-i2c-supply	: Power source required to power up i2c bus.
				GT9xx series can provide 1.8V from internal
				LDO, add this properties base on hardware
				design.
 - goodix,panel-coords	: Panel coordinates for the chip in pixels.
				It is a four tuple consisting of min x,
				min y, max x and max y values.
 - goodix,i2c-pull-up	: To specify pull up is required.
 - goodix,no-force-update	: To specify force update is allowed.
 - goodix,button-map	: Button map of key codes. The number of key codes
				depend on panel.
 - goodix,cfg-data0	: Touch screen controller config data group 0. Ask vendor
				to provide that.
				Driver supports maximum six config groups. If more than one
				groups are defined, driver will select config group depending
				on hardware configuration. If only config group 0 is defined,
				it will be used for all hardware configurations.
				Touch screen controller will use its onchip default config data
				if this property is not present.
 - goodix,cfg-data1	: Touch screen controller config data group 1. Ask vendor
				to provide that.
 - goodix,cfg-data2	: Touch screen controller config data group 2. Ask vendor
				to provide that.
 - goodix,cfg-data3	: Touch screen controller config data group 3. Ask vendor
				to provide that.
 - goodix,cfg-data4	: Touch screen controller config data group 4. Ask vendor
				to provide that.
 - goodix,cfg-data5	: Touch screen controller config data group 5. Ask vendor
				to provide that.
Example:
i2c@f9927000 {
		goodix@5d {
			compatible = "goodix,gt9xx";
			reg = <0x5d>;
			interrupt-parent = <&msmgpio>;
			interrupts = <17 0x2008>;
			reset-gpios = <&msmgpio 16 0x00>;
			interrupt-gpios = <&msmgpio 17 0x00>;
			avdd-supply = <&tp_power>;
			goodix,panel-coords = <0 0 720 1200>;
			goodix,display-coords = <0 0 720 1080>;
			goodix,button-map= <158 102 139>;
			goodix,product-id = "915";
			goodix,cfg-data0 = [
				41 D0 02 00 05 0A 05 01 01 08
				12 58 50 41 03 05 00 00 00 00
				00 00 00 00 00 00 00 8C 2E 0E
				28 24 73 13 00 00 00 83 03 1D
				40 02 00 00 00 03 64 32 00 00
				00 1A 38 94 C0 02 00 00 00 04
				9E 1C 00 8D 20 00 7A 26 00 6D
				2C 00 60 34 00 60 10 38 68 00
				F0 50 35 FF FF 27 00 00 00 00
				00 01 1B 14 0C 14 00 00 01 00
				00 00 00 00 00 00 00 00 00 00
				00 00 02 04 06 08 0A 0C 0E 10
				12 14 16 18 1A 1C FF FF FF FF
				FF FF FF FF FF FF FF FF FF FF
				FF FF 00 02 04 06 08 0A 0C 0F
				10 12 13 14 16 18 1C 1D 1E 1F
				20 21 22 24 26 28 29 2A FF FF
				FF FF FF FF FF FF FF 22 22 22
				22 22 22 FF 07 01];
		};
};