exynos_arm64_register_cmu(9)

💅 exynos_arm64_register_cmu(9) — the Kernel API Manual glow-up ✨

okay bestie, welcome to the exynos_arm64_register_cmu(9) page from the Kernel API Manual 🎀 — yes it's a real section 9 manpage and yes it's about registering an Exynos CMU domain. stay with me, it's gonna slay 🔥

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✨ NAME ✨

exynos_arm64_register_cmu — register the specified Exynos CMU domain 💖 literally what it says on the tin, no cap.

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🌸 SYNOPSIS 🌸

void exynos_arm64_register_cmu (struct device *dev , struct device_node
*np , const struct samsung_cmu_info *cmu );

she takes three args and returns void — a whole void, icon energy 👑

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🦋 ARGUMENTS 🦋

• dev — the device object 🫶 here's the tea though: this one may be NULL if this function is not being called from a platform driver probe function. so like, sometimes she's got no device and that's valid 💅
• np — the CMU device tree node 🌳 your device-tree bestie
• cmu — the CMU data 🍓 the actual payload, the main character

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👑 DESCRIPTION 👑

so what does registering a specified CMU domain actually mean? it's giving a whole little ritual, and it includes these next steps in order, periodt:

1. Enable the parent clock of cmu CMU ⭐ — gotta wake up the parent first, obviously
2. Set the initial registers configuration for cmu CMU clocks ✨ — get those registers looking cute from the jump
3. Register cmu CMU clocks using the Samsung clock framework API 🎀 — and then she's official

no shortcuts, no skipping steps, the order is the order 😌

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🔥 SEE ALSO 🔥

• the kernel file ./drivers/clk/samsung/clk-exynos-arm64.c — go read the source, iykyk 📖
• exynos_arm64_init_clocks(9) 🕐
• exynos_arm64_enable_bus_clk(9) 🚌
• exynos_arm64_register_cmu_pm(9) 😴 the power-management sibling, she's lowkey the same vibe but with PM

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ngl bestie, if you're poking at Exynos clock registration, read all three of those SEE ALSOs before you touch anything — they're the squad 🫶

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and that's the whole page, mwah 💋 — this little beauty lives in ./drivers/clk/samsung, dated October 2026, and it's filed under exynos_arm64_register_cmu(9) in the Kernel API Manual 🌈 stan the clock framework fr fr 🧚💜