RKCOMPHY(4)

💅 RKCOMPHY(4) — the kernel interfaces manual, but make it cute 🎀

okay so this is the rkcomphy page from section 4 of the manual (kernel interfaces, iykyk) — and bestie, it's short but it eats. let's get into it ✨

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🌸 NAME 🌸

rkcomphy — the Rockchip PCIe/USB3/SATA/QSGMII PHY, aka the little combo-PHY icon it is 👑

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✨ SYNOPSIS ✨

rkcomphy* at fdt?

that's it. that's the whole vibe. one line, attached at fdt?, living its best life 💅

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🦋 DESCRIPTION 🦋

so the rkcomphy driver controls the combo PIPE PHY integrated on Rockchip RK3528, RK3566/RK3568 and RK3588 SoCs. main character energy fr fr 👑

the PHY supports all of these protocols, no cap:

• PCIe 2.0 — at 2.5 GT/s and 5 GT/s 🔥
• USB 3.0 — at 5 Gbps ⚡
• SATA — at 1.5 Gbit/s, 3 Gbit/s and 6 Gbit/s 🍓
• QSGMII — at 1.25 Gbit/s and 5 Gbit/s 🌈

now the plot twist 😭 the rkcomphy driver does not implement support for QSGMII — so even though the hardware can do that protocol, the driver does not. lowkey tragic but we move. and on the RK3528 SoC, only PCIe is supported — that's the whole menu, bestie, nothing else 💀

not me emphasizing this again but fr: no QSGMII support in this driver, and RK3528 = PCIe only. that's a hardware/driver limitation, not a skill issue 🙈

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🫶 SEE ALSO 🫶

• intro(4) — go say hi to the intro page, it's the vibe check for section 4 💖

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👑 HISTORY 👑

the rkcomphy device driver first appeared in OpenBSD 7.3 — a certified icon since day one, periodt ⭐

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🧚 AUTHORS 🧚

the rkcomphy driver was written by Mark Kettenis <kettenis@openbsd.org> — absolute legend, we stan 🫶🌸

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and that's the page! this build of the manual is from Debian, dated March 26, 2026 — so if you're reading this from the future, hiii, hope the PHY is behaving 💜✨