allegro,a4979

Note

An implementation of a driver matching this compatible is available in drivers/stepper/allegro/a4979.c.

Description

Allegro A4979 microstepping stepper motor driver.
A4979 is a flexible microstepping motor driver with built-in translator for easy operation.
It is designed to operate bipolar stepper motors in full-, half-, quarter-, and sixteenth-step
modes.

Example:
a4979: a4979 {
    status = "okay";
    compatible = "allegro,a4979";
    micro-step-res = <2>;
    reset-gpios = <&gpiod 10 GPIO_ACTIVE_HIGH>;
    dir-gpios = <&gpiod 14 GPIO_ACTIVE_HIGH>;
    step-gpios = <&gpiod 15 GPIO_ACTIVE_HIGH>;
    en-gpios = <&gpiod 11 GPIO_ACTIVE_HIGH>;
    m0-gpios = <&gpiod 13 0>;
    m1-gpios = <&gpiod 12 0>;
    counter = <&counter5>;
};

Properties

Properties not inherited from the base binding file.

Name	Type	Details
`m0-gpios`	`phandle-array`	Microstep configuration pin 0. This property is required.
`m1-gpios`	`phandle-array`	Microstep configuration pin 1. This property is required.
`reset-gpios`	`phandle-array`	Reset pin This property is required.
`invert-direction`	`boolean`	Invert motor direction.
`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.