zl3073x_pin_check_freq(9)

💅 zl3073x_pin_check_freq — verify frequency for given pin

okay so bestie, real talk: this one lives in the Kernel API Manual and it's literally called zl3073x_pin_check_freq(9). It's a tiny little yes/no gatekeeper and honestly it's giving bouncer-at-the-club energy 👑 — freq shows up, freq gets vibe-checked, freq either gets in or doesn't. no cap.

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✨ SYNOPSIS ✨

bool zl3073x_pin_check_freq (struct zl3073x_dev *zldev , enum
       dpll_pin_direction dir , u8 id , u64 freq );

look at her. four args, one bool out. she's compact, she's efficient, she's iconic 🎀

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🫶 ARGUMENTS 🫶

• zldev — pointer to the zl3073x device. like, the whole device. the main character of this story 💖
• dir — the pin direction. which way is your pin facing, bestie 🌸
• id — pin index. gotta know which pin we're talking about, iykyk
• freq — the frequency to check. this is the number under investigation 🔍

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💫 DESCRIPTION 💫

so what does she actually do? The function checks whether the given frequency is valid for the device — that's the whole gig, no notes 👑

the way it works depends on which way your pin is pointing:

• input pins 🦋 — it checks that the frequency can be factorized using supported base frequencies. like, can we break this freq down into the base freqs we actually support? if yes, slay ✨ if no, sorry babe 😭
• output pins 🌈 — it checks that the frequency divides the connected synth frequency without remainder. dividing cleanly is the whole vibe check here. any leftover remainder and it's a no from her 💀

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⭐ RETURN ⭐

• true — if the frequency is valid 💖 periodt, it's good
• false — if not 🙈 not this one, bestie

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🎀 SEE ALSO 🎀

• Kernel file ./drivers/dpll/zl3073x/prop.c
• zl3073x_prop_pin_package_label_set(9)
• zl3073x_prop_pin_fwnode_get(9)
• zl3073x_pin_props_get(9)
• zl3073x_pin_props_put(9)
• zl3073x_prop_dpll_type_get(9)

go read them, fr fr, they're the rest of the friend group 🧚

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lowkey a reminder: this returns a plain bool — it's a check, not a mutation. it tells you about the frequency, it doesn't do anything to it. don't come for me if you expected side effects, that's not the vibe here 💅

okay that's the page!! this was the ./drivers/dpll/zl3073x fam, dated October 2026, page zl3073x_pin_check_freq(9) — mwah, love u, go check some frequencies bestie 💜🦋