omap4_prmins...rt_hardreset(9)

📦 version 7.3.1, in nixpkgs unstable

🎀 omap4_prminst_deassert_hardreset(9) 🎀

okay so bestie, welcome to the Kernel API Manual — this is the page for omap4_prminst_deassert_hardreset, and no, the title isn't a typo, it's just that long 💅

✨ NAME ✨

omap4_prminst_deassert_hardreset — deassert a submodule hardreset line and wait 🫶

🌸 SYNOPSIS 🌸

int omap4_prminst_deassert_hardreset (u8 shift , u8 st_shift , u8 part ,
       s16 inst , u16 rstctrl_offs , u16 rstst_offs );

🦋 ARGUMENTS 🦋

  • shift — the register bit shift that corresponds to the reset line you're deasserting, iykyk
  • st_shift — the status bit offset that corresponds to that reset line
  • part — the PRM partition, fr fr
  • inst — the PRM instance offset
  • rstctrl_offs — the reset register offset
  • rstst_offs — the reset status register offset

💖 DESCRIPTION 💖

So like, some IPs — think dsp, ipu or iva — contain processors that require an HW reset line to be asserted / deasserted in order to fully enable the IP. no cap. 🧚

These modules may have multiple hard-reset lines that reset different 'submodules' inside the IP block, which is giving very main-character-with-lore energy honestly.

This function will take the submodule out of reset and wait until the PRCM indicates that the reset has completed before returning. periodt. ✨

Returns 0 upon success, or -EINVAL upon an argument error, -EEXIST if the submodule was already out of reset, or -EBUSY if the submodule did not exit reset promptly. 😭

👑 SEE ALSO 👑

Kernel file ./arch/arm/mach-omap2/prminst44xx.c, plus the whole friend group:

🌈 cute sign-off time: this iconic lil page lives in ./arch/arm/mach-omap2 and it's dated October 2026. slay. 💜

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