omap_hdq1w_reset(9)

✨ omap_hdq1w_reset(9) ✨

okay so we're deep in the Kernel API Manual bestie, like genuinely deep — ARM mach-omap2 deep — and this one is a tiny function with a big secret 💅

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🌸 NAME 🌸

omap_hdq1w_reset — reset the OMAP HDQ1W module. that's it. that's the whole vibe check. it resets the thing 🫶

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🎀 SYNOPSIS 🎀

int omap_hdq1w_reset (struct omap_hwmod *oh );

like literally one argument, one int back, no drama ✨

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🦋 ARGUMENTS 🦋

• oh — a struct omap_hwmod *. that's the homie you're passing in. that's it, that's the parameter 💖

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🔥 DESCRIPTION 🔥

okay so what this does: it does an OCP soft reset on the HDQ1W IP block. periodt. 💅

but here's the tea, and it is scalding ☕ — Section 20.6.1.4 "HDQ1W/1-Wire Software Reset" of the OMAP34xx Technical Reference Manual Revision ZR (SWPU223R) just… does not mention the rather important fact that, for the reset to actually succeed, the HDQ1W module's internal clock gate must be programmed to let the clock propagate to the rest of the module. like bestie the docs forgor 💀 the single most important part. not me reading the TRM like "where is it. where is the clock gate paragraph."

ngl if you skip that clock gate setup, the reset will just not work, and you'll be sad. the manual will not have warned you. i'm warning you 🫶

and in this sense, it's rather similar to the I2C custom reset function — same energy, same little gotcha, iykyk 🌈

it returns 0. iconic. no cap 🎀

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👑 SEE ALSO 👑

• Kernel file ./arch/arm/mach-omap2/hdq1w.c — go read the source, it's right there, slay 📂💜

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and that's the whole page bestie!! ✨ this little gem lives in ./arch/arm/mach-omap2 and it's dated October 2026, and the manual itself goes by omap_hdq1w_reset(9) 🦋🌷 mwah, go reset something 💖🧚‍♀️