idpf_ptp_adjfine(9)

💅 idpf_ptp_adjfine 💅

okay so bestie, welcome to the Kernel API Manual — yes it's a kernel man page, yes it's about clocks, no you cannot leave yet, this one's actually cute ✨

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🌸 NAME 🌸

idpf_ptp_adjfine — adjusting the clock increment rate, aka making the clock speed up or slow down just a lil bit 🎀

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✨ SYNOPSIS ✨

int idpf_ptp_adjfine (struct ptp_clock_info *info , long scaled_ppm );

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🦋 ARGUMENTS 🦋

• info — the driver's PTP info structure 💖 like, this is the whole vibe of the PTP setup, hand it over
• scaled_ppm — parts per million with a 16-bit fractional field 🌈 so it's ppm but fancy, it's got decimals, it's giving precision

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💫 DESCRIPTION 💫

So basically: this adjusts the frequency of the clock by the indicated scaled ppm from the base frequency. that's it. that's the whole thing 🫶 nudge the clock's frequency up or down relative to where it started, and scaled_ppm tells it how much. lowkey iconic 🔥

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👑 RETURN 👑

• 0 on success 🎉 slay
• -errno otherwise 😭 so like, a negative errno, you know how kernel functions do

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🧚 SEE ALSO 🧚

first up, the actual source file, in case you wanna read the real thing:

Kernel file ./drivers/net/ethernet/intel/idpf/idpf_ptp.c

and then, the whole friend group 💜 — the entire idpf PTP fam, no cap:

• idpf_ptp_get_access(9)
• idpf_ptp_get_features_access(9)
• idpf_ptp_enable_shtime(9)
• idpf_ptp_read_src_clk_reg_direct(9)
• idpf_ptp_read_src_clk_reg_mailbox(9)
• idpf_ptp_read_src_clk_reg(9)
• idpf_ptp_get_sync_device_time_direct(9)
• idpf_ptp_get_sync_device_time_mailbox(9)
• idpf_ptp_get_sync_device_time(9)
• idpf_ptp_get_crosststamp(9)
• idpf_ptp_gettimex64(9)
• idpf_ptp_update_phctime_rxq_grp(9)
• idpf_ptp_update_cached_phctime(9)
• idpf_ptp_settime64(9)
• idpf_ptp_adjtime_nonatomic(9)
• idpf_ptp_adjtime(9)
• idpf_ptp_verify_pin(9)
• idpf_ptp_gpio_enable(9)
• idpf_ptp_tstamp_extend_32b_to_64b(9)
• idpf_ptp_extend_ts(9)
• idpf_ptp_request_ts(9)
• idpf_ptp_set_rx_tstamp(9)
• idpf_ptp_set_timestamp_mode(9)
• idpf_tstamp_task(9)
• idpf_ptp_do_aux_work(9)
• idpf_ptp_set_caps(9)
• idpf_ptp_create_clock(9)
• idpf_ptp_release_vport_tstamp(9)
• idpf_ptp_release_tstamp(9)
• idpf_ptp_get_txq_tstamp_capability(9)
• idpf_ptp_init(9)
• idpf_ptp_release(9)

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okay that's the whole page bestie, go adjust some frequencies, drink water, and remember: scaled_ppm has a 16-bit fractional field and that's on periodt 💅

mwah 💖 this one's from ./drivers/net/ethernet/intel/idpf, dated October 2026 — see u in the next man page, love u, bye 🎀✨