am33xx_prm_assert_hardreset(9)

💅 am33xx_prm_assert_hardreset — like, the actual Kernel API Manual ✨

okay so bestie, welcome to the glow-up of a kernel function that lives way down in the omap2 vibe trenches. This is the page for am33xx_prm_assert_hardreset from the Kernel API Manual, and yes she's niche, yes she's iconic, and yes we're getting into it 🎀

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🌸 NAME 🌸

am33xx_prm_assert_hardreset — assert the HW reset line of a submodule

like literally. that's her whole job. one line of purpose, no notes 💅

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✨ SYNOPSIS ✨

int am33xx_prm_assert_hardreset (u8 shift , u8 part , s16 inst , u16
rstctrl_offs );

she takes four args and returns an int, that's the whole shape of it 🦋

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🫶 ARGUMENTS 🫶

• shift — the register bit shift that corresponds to the reset line you want to assert. it's giving "which exact bit are we poking" energy 🔥
• part — CM partition. for AM33xx this is ignored, so like… she's there but she's not really there, yk? 🙈
• inst — CM instance register offset (that's the *_INST macro, iykyk)
• rstctrl_offs — -- undescribed -- … yeah. the manual itself just says -- undescribed -- and honestly? relatable. keeping it mysterious 💀 no cap, that's all the original gives us, so I'm not gonna invent lore for her.

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💖 DESCRIPTION 💖

so some IPs — think dsp, ipu or iva — contain processors that require a HW reset line to be asserted / deasserted in order to fully enable the IP. like they literally won't wake up properly without it, main character energy 👑

these modules may have multiple hard-reset lines that reset different 'submodules' inside the IP block. so you're not just flipping one big switch, you're picking which little diva inside the block gets reset 🌈

This function will place the submodule into reset. that's the whole gig. that's what she does 🧚

Returns 0 upon success or -EINVAL upon an argument error — so like, if you fed her nonsense, she's gonna tell you with -EINVAL, periodt 💅

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🦋 SEE ALSO 🦋

• Kernel file ./arch/arm/mach-omap2/prm33xx.c
• am33xx_prm_is_hardreset_asserted(9)
• am33xx_prm_deassert_hardreset(9)

(the asserted one checks her vibe, the deassert one un-does the reset. dream team fr fr 🫶)

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and that's the whole page, bestie ⭐ this little love letter came straight from ./arch/arm/mach-omap2, dated October 2026, and yes the header up top is still am33xx_prm_assert_hardreset(9) because we respect her full government name 💜 bye, go assert some resets responsibly 🌸