_of_pll_clk_init(9)

💫 _of_pll_clk_init(9) 💫

okay so bestie, welcome to the Kernel API Manual — yes we're literally in the kernel docs together, hold my hand 🫶 this one is about _of_pll_clk_init, which is giving "tiny function, big responsibility" energy ngl.

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✨ NAME ✨

_of_pll_clk_init — PLL initialisation via DT 💅

like, it sets up a PLL using the device tree. no cap, that's the whole vibe of the name.

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🦋 SYNOPSIS 🦋

void _of_pll_clk_init (struct device_node *node , bool pllctrl );

that's it. that's the signature. it returns void, so don't go looking for a return value, there isn't one, periodt.

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🎀 ARGUMENTS 🎀

• node — the device tree node for this clock 🌸 like, this is the DT node that represents the clock we're initialising, she's the main character here.
• pllctrl — a bool, and the way it works is genuinely so specific: if it's true, the lower 6 bits of the multiplier live in the pllm register of the pll controller ✨ but if it's false, those lower 6 bits are instead in the control register0, specifically bits 11-6 👑 iykyk.

lowkey important: that's bits 11 through 6 of control register0 when pllctrl is false, versus the pllm register of the pll controller when it's true. two completely different homes for the same 6 bits, and you gotta know which one you're in 🙈

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🌈 SEE ALSO 🌈

• the kernel file ./drivers/clk/keystone/pll.c — go read her, she's the source fr fr 💖
• struct clk_pll_data(9)
• struct clk_pll(9)
• of_keystone_pll_clk_init(9)
• of_keystone_main_pll_clk_init(9)
• of_pll_div_clk_init(9)
• of_pll_mux_clk_init(9)

the whole keystone clock friend group honestly, we love a supportive squad 🧚

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and that's the page!! this one lives in ./drivers/clk/keystone, dated October 2026, and yes the footer still says _of_pll_clk_init(9) because she's consistent like that 💜 slay, go init some PLLs bestie 💅🔥