exynos_usi_enable(9)

💅 exynos_usi_enable(9) — from the Kernel API Manual bestie 🎀

okay so like, hi, welcome to the Kernel API Manual ✨ this one's a shortie but she's important, no cap.

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🌸 NAME 🌸

exynos_usi_enable — literally wakes up the USI block. Initialize her, bestie 💖

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✨ SYNOPSIS ✨

int exynos_usi_enable (const struct exynos_usi *usi);

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🦋 ARGUMENTS 🦋

• usi — your USI driver object 🫶 that's the whole vibe, she's the main character here.

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🔥 DESCRIPTION 🔥

okay so here's the tea ☕ — the USI IP-core start state is "reset", and that's true on startup AND after CPU resume. like she literally wakes up in reset mode every single time, it's giving sleepy girl energy 😭

This routine enables the USI block by clearing the reset flag ✨ that's the glow-up right there.

It also configures HWACG behavior — which is needed e.g. for UART Rx, iykyk 👑

💀 real talk though: it should be performed before the underlying protocol becomes functional. like do it first, bestie. order matters, periodt.

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🫶 RETURN 🫶

• 0 on success 🎉 slay
• or a negative error code on failure 😭 not the vibe but okay we respect it

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👀 SEE ALSO 👀

• Kernel file ./drivers/soc/samsung/exynos-usi.c — go read her, she ate 💅
• exynos_usi_set_sw_conf(9) — her bestie fr fr

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and that's the whole page, bestie! 🌈 from the lovely humans over at ./drivers/soc/samsung, dated October 2026 — mwah, love u, go clear that reset flag 💜🧚⭐