dprc_set_irq_enable(9)

📦 version 7.3.1, in nixpkgs unstable

💅 dprc_set_irq_enable — like, the overall interrupt switch, bestie

Okay so this is a page from the Kernel API Manual, and the star of the show is dprc_set_irq_enable(9). Buckle up, it's a short one but it's iconic.

✨ NAME ✨

dprc_set_irq_enable — set the overall interrupt state. Yep, that's the whole vibe check: one function, one job, and it does it. 🎀

🌸 SYNOPSIS 🌸

int dprc_set_irq_enable (struct fsl_mc_io *mc_io , u32 cmd_flags , u16
token , u8 irq_index , u8 en );

Five args, returns an int, no cap. 🫶

🦋 ARGUMENTS 🦋

  • mc_io — pointer to the MC portal's I/O object. That's your lil handle to the whole thing, bestie. 💖
  • cmd_flags — command flags; one or more of 'MC_CMD_FLAG_'. Pick your flags, slay. ⭐
  • token — the token of the DPRC object. Gotta know which DPRC you're talking to, obviously. 👑
  • irq_index — the interrupt index you wanna configure. Every interrupt has its own little number ok. 🔥
  • en — the interrupt state: enable = 1, disable = 0. That's it, that's the whole binary moment. binary literal queen 💅

💜 DESCRIPTION 💜

So what this actually does: it lets GPP software control when interrupts get generated. Fr fr, that's the whole point.

Each interrupt can have up to 32 causes — thirty-two!! 😭 So many causes, so little time.

The enable/disable control is the overall interrupt state. Meaning: if the interrupt is disabled, then no causes will cause an interrupt. Like, none of them. Zero. Not even the really good ones. The whole thing is just off. 💀

lowkey the most important sentence on this page: disable = no causes fire, periodt. Don't come crying to me when your handler never runs. 🙈

🌈 RETURN 🌈

Okay so… the original page has this heading and then literally nothing under it. No documented return value, no error codes, nothing. Not me leaving it blank 💀 — that's genuinely how it is. The function is declared int up top, so like, it returns one, bestie, but this page isn't telling us what. 🍓

🧚 SEE ALSO 🧚

The kernel file lives at ./drivers/bus/fsl-mc/dprc.c — go read the source if you want the real tea. ☕ And here's the whole friend group:

Okay bye bestie!! This little page dropped in October 2026 and it comes to you straight from ./drivers/bus/fsl-mc. Go enable some interrupts (or don't — en = 0 is also valid, live your truth). 🎀💖✨

📦 where this page comes from