ptp_clock_index_by_of_node(9)

💅 ptp_clock_index_by_of_node — Kernel API Manual, bestie edition 🎀

okay so welcome to the Kernel API Manual entry for ptp_clock_index_by_of_node, and yes we're doing this together because you're gonna slay this 💖

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✨ NAME ✨

ptp_clock_index_by_of_node — get the device index of a PTP clock, based on the PTP device's of_node 🦋

Like, that's the whole vibe. You hand it a node, it hands you back an index. Iconic behavior honestly.

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🌸 SYNOPSIS 🌸

int ptp_clock_index_by_of_node (struct device_node *np );

That's it. One function, one argument, no drama 💅

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🎀 ARGUMENTS 🎀

• np — the device of_node pointer of the PTP device 🫶 that's your little device-tree handle, the thing that tells the kernel which PTP device we're talking about. Hand it over and let the function cook.

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⭐ RETURN ⭐

• The PHC index on success 🎉 like yes queen, you got your index
• -1 on failure 😭 so like... check that, bestie. -1 means it did not go well.

fr fr: if you see -1 coming back, do not just keep vibing — something didn't resolve. 😭

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🔥 SEE ALSO 🔥

okay this list is long and honestly it ate 👑

Kernel file: ./include/linux/ptp_clock_kernel.h

• struct ptp_clock_request(9)
• struct ptp_system_timestamp(9)
• struct ptp_clock_info(9)
• struct ptp_clock_event(9)
• scaled_ppm_to_ppb(9)
• diff_by_scaled_ppm(9)
• adjust_by_scaled_ppm(9)
• ptp_clock_register(9)
• ptp_clock_unregister(9)
• ptp_clock_event(9)
• ptp_clock_index(9)
• ptp_clock_index_by_dev(9)
• ptp_find_pin(9)
• ptp_find_pin_unlocked(9)
• ptp_schedule_worker(9)
• ptp_cancel_worker_sync(9)
• ptp_get_vclocks_index(9)
• ptp_convert_timestamp(9)

iykyk, that's the whole PTP friend group right there 🌈

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mwah 💜 that's the whole page! this one lives under <code>./include/linux</code>, dated <b>October 2026</b>, and it's page <code>ptp_clock_index_by_of_node(9)</code> of the Kernel API Manual — go forth and get those indices, bestie, you're literally the main character of the device tree 🧚✨