tsc-keys

Vendor: Generic or vendor-independent

Description

Input driver for STM32 Tocuh Sensing Controller (TSC).

This node is a st,stm32-tsc grandchild node and applies filters and
calculations to detect an input event on a group which is the child of
st,stm32-tsc. For more information see drivers/misc/st,stm32-tsc.yaml

Example:

#include <dt-bindings/input/input-event-codes.h>

&tsc {
  compatible = "st,stm32-tsc";

  tsc_group6: g6 {
    ...
    ts1 {
      compatible = "tsc-keys";
      sampling-interval-ms = <10>;
      oversampling = <10>;
      noise-threshold = <50>;
      zephyr,code = <INPUT_KEY_0>;
    };
  };
};

Properties

Properties not inherited from the base binding file.

Name

Type

Details

sampling-interval-ms

int

 
Sampling interval in milliseconds.

This property is required.

oversampling

int

 
Over sampling factor. The driver will take the average of the samples
taken in the sampling interval and compare it with the previous sample.
Larger values will reduce the noise but will increase the latency. The
default value is 10 so the slope will be calculated every
10 * sampling-interval-ms milliseconds.

This property is required.

noise-threshold

int

 
This value will be used to reject the noise for both
directions of the slope.

This property is required.

sticky-key-timeout-ms

int

 
Time in milliseconds to wait before releasing a key. By default a release
event will be generated after 10 seconds of the last press event if
the key is still pressed.

This property is required.

zephyr,code

int

 
Key code to emit.

This property is required.