comedi_pcmcia_enable(9)

📦 version 7.3.1, in nixpkgs unstable

💅 comedi_pcmcia_enable — NAME ✨

ok so bestie, welcome to the Kernel API Manual entry for comedi_pcmcia_enable — it's the function that requests the regions and enables the PCMCIA device. That's the whole vibe. Short king. 👑

🎀 SYNOPSIS 🎀

int comedi_pcmcia_enable (struct comedi_device *dev , int
(*conf_check)(struct pcmcia_device *p_dev, void *priv_data) );

literally just two args, no cap. 🫶

🌸 ARGUMENTS 🌸

  • dev — your COMEDI device. the main character of this whole operation 💖
  • conf_check — an optional callback that checks each configuration option of the PCMCIA device and requests I/O regions. optional like your third coffee of the day ☕

✨ DESCRIPTION ✨

okay so here's the lore. assuming dev->hw_dev is non-NULL, it's assumed to be pointing to a struct device embedded in a struct pcmcia_device. cute, right? nesting dolls but make it kernel. 🪆

watch out — the original page says "a a struct device" and honestly? we stan a double-a. keeping it real, fr fr. 😭

before you even think about calling this function, the comedi PCMCIA driver needs to set the config_flags member in the struct pcmcia_device, as appropriate for that driver — that's non-negotiable, bestie — so that pcmcia_loop_config can do its internal autoconfiguration. it's giving "get your homework done before class" energy. 📚

if conf_check is NULL, it gets set to a default function. that function is passed to pcmcia_loop_config and it should return 0 if the configuration is valid and the I/O regions were requested successfully — otherwise it should return a negative error value. and the default function returns -EINVAL if the returns the result. 💀

ngl that last sentence is just as mysterious on the original page — "if the returns the result" — we're preserving it exactly because your girl does not invent technical claims. that's between you and the source file, iykyk 🙈

if the above configuration check passes? pcmcia_enable_device is called to set up and activate the PCMCIA device. slay. that's the actual activation moment. 🔥

⚠️ important, bestie: if this function returns an error, comedi_pcmcia_disable should be called to release requested resources. do not leave those resources hanging, that's so not the vibe. clean up after yourself. 🧚

🦋 RETURN 🦋

  • 0 on success — we love a clean win ⭐
  • -ENODEV if dev->hw_dev is NULL (yes, the original says "id", we all know it's "if", we're moving on 😌)
  • a negative error number from pcmcia_loop_config if it fails
  • or a negative error number from pcmcia_enable_device if it fails

like any of those negative returns? handle them. periodt. 💅

🌈 SEE ALSO 🌈

kernel file ./drivers/comedi/comedi_pcmcia.c, plus the whole friend group:

all of them live in ./drivers/comedi and honestly they're all icons 👑

and that's the page!! 💖✨🎀🦋🌸💅🫶

cute little sign-off before you go: this lil masterpiece is from ./drivers/comedi and it's dated October 2026 — yes, the future, because we're ahead of the curve. see u in the next manpage bestie, mwah 😘💜

📦 where this page comes from