STRUCT ST_CLK_QUADFS_PLL(9)

💅 struct st_clk_quadfs_pll(9) — the Kernel API Manual, but make it make sense 🎀

okay so bestie, welcome to the Kernel API Manual entry for struct st_clk_quadfs_pll ✨ this whole page is literally about one struct, and she's kind of a big deal. lowkey she's a PLL that outputs a fixed multiplier of her parent clock, and she lives inside a type of ST quad channel frequency synthesizer block 🦋 iykyk.

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🌸 NAME 🌸

struct st_clk_quadfs_pll — a pll which outputs a fixed multiplier of its parent clock, found inside a type of ST quad channel frequency synthesizer block 💖

like… she multiplies. that's her whole thing. fixed multiplier, parent clock, ST quad channel frequency synthesizer block. no cap. periodt.

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✨ SYNOPSIS ✨

struct st_clk_quadfs_pll {
    struct clk_hw   hw;
    void __iomem    *regs_base;
    spinlock_t *lock;
    struct clkgen_quadfs_data *data;
    u32 ndiv;
 };

look at her. five fields. main character energy only 😭💅

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🫶 Members 🫶

• hw — handle between common and hardware-specific interfaces. she's the bridge, the go-between, the social butterfly of the struct 🦋
• regs_base — base address of the configuration registers. it's giving "where the settings actually live" 📍
• lock — spinlock. gotta keep things orderly, bestie 🔒
• data — local driver data. her personal stash of driver info 🎀
• ndiv — regmap field for the ndiv control. yes, that's the ndiv control. iconic. no further notes 💀

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🔥 SEE ALSO 🔥

• Kernel file ./drivers/clk/st/clkgen-fsyn.c
• A Frequency Synthesizer that multiples its input clock by a fixed factor(9)
• A digital frequency synthesizer(9)

go read those if you wanna go deeper, bestie. i'm obsessed with the fact that "multiples" is spelled exactly like that — copying it verbatim, character for character, because that is the assignment 💜

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ngl this struct is small but she's doing a LOT. respect her. 👑

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and that's the whole page, bestie 🍓 — brought to you from ./drivers/clk/st, dated October 2026, in the struct st_clk_quadfs_pll(9) era ✨ stay clocky 💅💖