xptek,xpt2046 (on spi bus)

Vendor: Shenzhen Xptek Technology Co., Ltd

Description

These nodes are “kscan” bus nodes.

Driver for XPT2046 touch IC

Properties

Properties not inherited from the base binding file.

Name

Type

Details

int-gpios

phandle-array

 
Interrupt GPIO.

This property is required.

touchscreen-size-x

int

 
horizontal resolution of screen

This property is required.

touchscreen-size-y

int

 
vertical resolution of screen

This property is required.

min-x

int

 
minimum raw X value reported.

This property is required.

min-y

int

 
minimum raw Y value reported.

This property is required.

max-x

int

 
maximum raw X value reported.

This property is required.

max-y

int

 
maximum raw Y value reported.

This property is required.

z-threshold

int

 
Z value threshold to trigger a touch

Default value: 100

reads

int

 
How many reads per touch to average the value

Default value: 1

spi-max-frequency

int

 
Maximum clock frequency of device's SPI interface in Hz

This property is required.

duplex

int

 
Duplex mode, full or half. By default it's always full duplex thus 0
as this is, by far, the most common mode.
Use the macros not the actual enum value, here is the concordance
list (see dt-bindings/spi/spi.h)
  0    SPI_FULL_DUPLEX
  2048 SPI_HALF_DUPLEX

Legal values: 0, 2048

frame-format

int

 
Motorola or TI frame format. By default it's always Motorola's,
thus 0 as this is, by far, the most common format.
Use the macros not the actual enum value, here is the concordance
list (see dt-bindings/spi/spi.h)
  0     SPI_FRAME_FORMAT_MOTOROLA
  32768 SPI_FRAME_FORMAT_TI

Legal values: 0, 32768

supply-gpios

phandle-array

 
GPIO specifier that controls power to the device.

This property should be provided when the device has a dedicated
switch that controls power to the device.  The supply state is
entirely the responsibility of the device driver.

Contrast with vin-supply.

vin-supply

phandle

 
Reference to the regulator that controls power to the device.
The referenced devicetree node must have a regulator compatible.

This property should be provided when device power is supplied
by a shared regulator.  The supply state is dependent on the
request status of all devices fed by the regulator.

Contrast with supply-gpios.  If both properties are provided
then the regulator must be requested before the supply GPIOS is
set to an active state, and the supply GPIOS must be set to an
inactive state before releasing the regulator.