ptp_qoriq_nominal_freq(9)

💅 ptp_qoriq_nominal_freq (from the Kernel API Manual bestie!!)

okay so this one's a lil function from the Kernel API Manual and honestly? it's giving "math but make it clockcore" 🕰️✨ like it's literally just doing frequency math for you and i'm obsessed.

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✨ NAME ✨

ptp_qoriq_nominal_freq — the girlie that calculates the nominal frequency according to the reference clock frequency 🎀

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🌸 SYNOPSIS 🌸

u32 ptp_qoriq_nominal_freq (u32 clk_src );

that's it. one arg. one u32 in, one u32 out. no cap. 💅

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🦋 ARGUMENTS 🦋

• clk_src — the reference clock frequency, bestie. that's the input, that's the vibe check, that's what you're feeding in 🍓

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💖 DESCRIPTION 💖

okay so, the nominal frequency is literally the desired clock frequency. main character energy fr fr. 👑

but like — important rules, don't skip these:

• it should be less than the reference clock frequency (clk_src), no exceptions 🙈
• it should be a factor of 1000MHz, periodt 💀

and then!! it returns the nominal frequency. that's the whole glow-up. ✨

lowkey just remember: smaller than clk_src, factor of 1000MHz, and you're slaying 🫶

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🔥 SEE ALSO 🔥

• the Kernel file: ./drivers/ptp/ptp_qoriq.c
• ptp_qoriq_auto_config(9) — its bestie, literally ykyk 🌈

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and that's the page!! 🌟 source/version is ./drivers/ptp and it's dated October 2026, so go forth and calculate those frequencies, bestie 💜🎀💅