omap3xxx_hwm...block_usable(9)

💅 omap3xxx_hwmod_is_hs_ip_block_usable 💅

okay bestie, so this is a page from the Kernel API Manual, section 9, and the star of the show is omap3xxx_hwmod_is_hs_ip_block_usable. yes that's a whole mouthful, we're just gonna vibe with it. 🫶

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✨ NAME ✨

omap3xxx_hwmod_is_hs_ip_block_usable — basically: is this security IP block actually accessible? 👀 that's the whole question, that's the assignment.

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🦋 SYNOPSIS 🦋

bool omap3xxx_hwmod_is_hs_ip_block_usable (struct device_node *bus ,
       const char *dev_name );

like, yes, it returns a bool. we love a yes/no king. 👑

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🎀 ARGUMENTS 🎀

• bus — a struct device_node * for the top-level OMAP DT data. think of it as the family tree of your device, the whole ~tree~ situation. 🌳
• dev_name — the device name used in the DT file. literally just the name, it's giving "please state your name for the record". 📋

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🌸 DESCRIPTION 🌸

so the whole point is figuring out whether a "secure" IP block named dev_name is usable by Linux. and ngl, there doesn't appear to be a 100% reliable way to determine this 😭 so we rely on heuristics. yes, heuristics. we're guessing, but we're guessing smart. 💀

here's the tea:

• if bus is null — meaning there's no DT data — then we only assume the IP block is accessible if the OMAP is fused as a 'general-purpose' SoC. that's the whole vibe check. ✨
• if DT data is present, though, we test to see if the IP block is described in the DT data and set to OMAP firewalls to allow access to the IP block. 🔥 so like, is it even in the tree? is the firewall letting it through? both need to be a yes for you to slay.

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⭐ RETURN ⭐

• 0 — if the device named dev_name is not likely to be accessible 🙈
• 1 — if it is likely to be accessible 🎉

that's it, that's the return. binary baby, no in-between. 💅

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👑 SEE ALSO 👑

check out this kernel file bestie, it's where the lore lives:

./arch/arm/mach-omap2/omap_hwmod_3xxx_data.c

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⚠️ heads up: the "100% reliable way" truly does not exist here. heuristics only. no cap. 🫡

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and that's the page!! sourced from ./arch/arm/mach-omap2, dated October 2026, from the Kernel API Manual, section 9. mwah, go forth and check your firewalls 💖 🧚 🌈