ti,drv8424

Vendor: Texas Instruments

Note

An implementation of a driver matching this compatible is available in drivers/stepper/ti/drv8424.c.

Description

TI DRV8424 stepper motor driver.
SAFETY:
The counter needs to support both set_top_value functionalities: Setting a new top value and
attaching an ISR to the turnaround.
SAFETY:
The step gpio pin needs to be connected directly to the SOC GPIO controller, connecting the
pin to a controller connected via a bus such as i2c or others will lead to undefined behaviour.

Example:
drv8424: drv8424 {
  status = "okay";
  compatible = "ti,drv8424";

  dir-gpios = <&arduino_header 18 0>;
  step-gpios = <&arduino_header 19 0>;
  sleep-gpios = <&arduino_header 15 GPIO_ACTIVE_LOW>;
  en-gpios  = <&arduino_header 14 0>;
  m0-gpios = <&mikroe_stepper_gpios 0 0>;
  m1-gpios = <&mikroe_stepper_gpios 1 0>;
  counter = <&counter2>;
};

Properties

Node specific propertiesDeprecated node specific propertiesBase properties

Properties not inherited from the base binding file.

Name	Type	Details
fault-gpios	phandle-array	Fault pin.
sleep-gpios	phandle-array	Sleep pin (active low).
m0-gpios	phandle-array	Microstep configuration pin 0. This property is required.
m1-gpios	phandle-array	Microstep configuration pin 1. This property is required.
micro-step-res	int	micro-step resolution to be set while initializing the device driver. Default value: 1 Legal values: 1, 2, 4, 8, 16, 32, 64, 128, 256
en-gpios	phandle-array	GPIO pins used to control the enable signal of the motor driver.
step-gpios	phandle-array	The GPIO pins used to send step signals to the stepper motor.
dir-gpios	phandle-array	The GPIO pins used to send direction signals to the stepper motor. Pin will be driven high for forward direction and low for reverse direction.
counter	phandle	Counter used for generating step-accurate pulse signals.