devm_of_regu...get_optional(9)

📦 version 7.3.1, in nixpkgs unstable

💅 devm_of_regu...get_optional(9) — a whole entire kernel API manual, bestie

okay so this is from the Kernel API Manual and the star of the show is devm_of_regulator_get_optional, which is the resource-managed version of of_regulator_get_optional(). yes the title is truncated with dots, no we're not gonna be normal about it ✨

✨ NAME ✨

devm_of_regulator_get_optional — it's literally just of_regulator_get_optional() but with the "devm" glow-up, aka Resource managed. 🫶

🌸 SYNOPSIS 🌸

struct regulator * devm_of_regulator_get_optional (struct device *dev ,
       struct device_node *node , const char *id );

that's the whole vibe. three args, one pointer back, no cap. 💅

🎀 ARGUMENTS 🎀

  • dev — the device, bestie. it's what gets used for dev_printk messages and it's the thing that owns the resource lifetime management (so like, it decides how long this whole situationship lasts 🦋).
  • node — the device node for the regulator "consumer". yes the quotes are in the original, it's giving very "we don't know what you're doing with it either" 💀
  • id — the supply name or the regulator ID. pick one, it's your label ✨

👑 DESCRIPTION 👑

so this is the Managed regulator_get_optional. what does managed mean in this context? it means the regulators you get back from this function are automatically regulator_put on driver detach. like you don't have to clean up after yourself, the kernel does it for you. main character behaviour fr fr. 😌

want more tea on how the actual getting works? the original says to see of_regulator_get_optional for more information — so go read that one, iykyk 📖

🌈 SEE ALSO 🌈

so the kernel file here is ./drivers/regulator/devres.c and honestly the friend group is large, let's go through them one by one 🧚

like i said. huge friend group. all iconic. 🔥

ok that's the whole page, go get your regulator (optionally) 💖

and that's a wrap on this one, bestie — brought to you by the ./drivers/regulator source and version, dated October 2026, signing off with devm_of_regu...get_optional(9) energy forever ⭐🎀🌸

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