timing_setup(9)

💅 timing_setup(9) — like, the Kernel API Manual page, bestie 🎀

okay so before we even get into it: this is a page from the Kernel API Manual, entry timing_setup(9). That's the manual name, that's the vibe, and yes we are reading kernel API docs for fun now. main character energy fr fr ✨

---

🌸 NAME 🌸

timing_setup — shared timing computation and load. it does the math and the loading, like a multi-talented icon 👑

---

✨ SYNOPSIS ✨

void timing_setup (struct ata_port *ap , struct ata_device *adev , int
offset , int speed , int clock );

like, exactly that. no cap, that's the whole signature 🫶

---

🦋 ARGUMENTS 🦋

• ap — the ATA port that's getting set up. she's the one we're working on 💖
• adev — the drive being configured. the drive in question, the main character of the drive world 🌟
• offset — the port offset. where the port lives, basically 📍
• speed — the target speed we're aiming for. goals, honestly 🔥
• clock — the clock multiplier (aka the number of times 33MHz for this part). yes, 33MHz, that's a literal number, don't @ me 💀

---

🌈 DESCRIPTION 🌈

so here's the tea: timing_setup performs the actual timing set up for Nvidia or AMD PATA devices. like, the real work, not just the planning phase 💅

the actual devices vary — every single one of them is doing its own thing, lowkey — so they all call into this helper function, and they bring it two gifts: the clock multiplier and the offset. why the offset? because AMD and Nvidia put the ports at different locations. iconic of them to be different, honestly. so the helper just gets handed the numbers and handles the shared computation-and-load situation for everybody 🧚

ngl the whole point is: one helper, many devices, shared timing computation and load. teamwork, but make it kernel 🫶

---

💜 SEE ALSO 💜

• Kernel file ./drivers/ata/pata_amd.c — that's where the family lives, go say hi 🌸
• amd_pre_reset(9)
• amd_cable_detect(9)
• amd_fifo_setup(9)
• amd33_set_piomode(9)
• amd33_set_dmamode(9)
• nv_pre_reset(9)
• nv100_set_piomode(9)
• nv100_set_dmamode(9)

that's nine references and every single one of them is here, because we do not skip entries in this house 👑✨

---

aaaand that's the page, bestie! this one's filed under ./drivers/ata in the October 2026 edition of the manual — so go forth, set up those timings, and slay 💅🎀💖