subdev_8255_io_init(9)

💖 NAME 💖

okay bestie, welcome to subdev_8255_io_init(9) from the Kernel API Manual — she’s literally the main character for setting up a DIO subdevice that drives an I/O mapped 8255. no cap.

subdev_8255_io_init — initialize DIO subdevice for driving I/O mapped 8255

✨ SYNOPSIS ✨

int subdev_8255_io_init (struct comedi_device *dev , struct
       comedi_subdevice *s , unsigned long regbase );

🎀 ARGUMENTS 🎀

• dev — comedi device owning subdevice
• s — comedi subdevice to initialize
• regbase — offset of 8255 registers from dev->iobase

💅 DESCRIPTION 💅

she initializes a comedi subdevice as a DIO subdevice driving an 8255 chip. that’s the whole vibe — setup, slay, periodt. 💅

🌸 RETURN 🌸

it gives you -ENOMEM if failed to allocate memory, and zero on success. iconic behavior, honestly. 🫶

🦋 SEE ALSO 🦋

• Kernel file ./drivers/comedi/drivers/comedi_8255.c
• subdev_8255_mm_init(9)
• subdev_8255_cb_init(9)
• subdev_8255_regbase(9)

mwah 💋 cute little sign-off for you: source/version is ./drivers/comedi/drivers, date is October 2026, and this whole footer moment belongs to subdev_8255_io_init(9). bye bestie, go init that subdevice 🫶✨