exynos_arm64_enable_bus_clk(9)

✨ exynos_arm64_enable_bus_clk(9) ✨

okay so bestie, welcome to the Kernel API Manual — this one's a 9-section page and it's lowkey a little baddie 💅

🌸 NAME 🌸

exynos_arm64_enable_bus_clk — the function that enables the parent clock of a specified CMU. yes queen, that's the whole job, and she does it flawlessly 🎀

🦋 SYNOPSIS 🦋

int exynos_arm64_enable_bus_clk (struct device *dev , struct device_node
*np , const struct samsung_cmu_info *cmu );

look at her. three args, returns an int, const-correct on the cmu. main character energy ngl 👑

💖 ARGUMENTS 💖

• dev — the device object 🫶. Heads up though: this one may be NULL if this function is not being called from a platform driver probe function. so like, NULL is valid here, don't panic.
• np — the CMU device tree node 🌳 — that's your node pointer.
• cmu — the CMU data 📦, coming in as a const struct samsung_cmu_info * because we're not touching it, we're just reading her vibe.

🌈 DESCRIPTION 🌈

So what does she actually do? She keeps the CMU parent clock running — and the reason is honestly so real: you need that parent clock alive for CMU registers access 🔥. Like, no clock, no register poking. That's the whole deal, periodt.

⭐ RETURN ⭐

• 0 on success 🎉 — slay, we're so back
• a negative error code on failure 😭 — not slay, but at least it's negative, which is how the kernel says "no"

🧚 SEE ALSO 🧚

• Kernel file ./drivers/clk/samsung/clk-exynos-arm64.c 📂 — that's where the girlies live
• exynos_arm64_init_clocks(9) ✨
• exynos_arm64_register_cmu(9) 💜
• exynos_arm64_register_cmu_pm(9) 💫

and that's the page!! 🍓 this iconic lil manual lives in ./drivers/clk/samsung and it's dated October 2026 — yes, future-dated, she's ahead of her time 👑💖 ily, go enable those bus clocks bestie 🫶