On 28/01/2024 17:36, Stefan Wahren wrote: > From: Vincent Whitchurch <vincent.whitchurch@xxxxxxxx> > > Add a software PWM which toggles a GPIO from a high-resolution timer. > > This will naturally not be as accurate or as efficient as a hardware > PWM, but it is useful in some cases. I have for example used it for > evaluating LED brightness handling (via leds-pwm) on a board where the > LED was just hooked up to a GPIO, and for a simple verification of the > timer frequency on another platform. > ... > + > +static struct platform_driver pwm_gpio_driver = { > + .driver = { > + .name = "pwm-gpio", > + .of_match_table = pwm_gpio_dt_ids, > + }, > + .probe = pwm_gpio_probe, > + .remove_new = pwm_gpio_remove, > +}; > +module_platform_driver(pwm_gpio_driver); > + > +MODULE_DESCRIPTION("PWM GPIO driver"); > +MODULE_ALIAS("platform:pwm-gpio"); You should not need MODULE_ALIAS() in normal cases. If you need it, usually it means your device ID table is wrong (e.g. misses either entries or MODULE_DEVICE_TABLE()). MODULE_ALIAS() is not a substitute for incomplete ID table. Best regards, Krzysztof