STRUCT KEMPLD_DEVICE_DATA(9)

💖 struct kempld_device_data(9) 💖

okay so this is a page from the Kernel API Manual, and bestie, we're about to get into the internal representation of the PLD device — yes, that's the whole NAME, and yes, it ate. 🫶

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✨ NAME ✨

struct kempld_device_data — literally the internal representation of the PLD device. that's it, that's the vibe. 💅

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🌸 SYNOPSIS 🌸

no cap, here's the whole struct, exactly as it lives:

struct kempld_device_data {
    void __iomem            *io_base;
    void __iomem            *io_index;
    void __iomem            *io_data;
    u32 pld_clock;
    u32 feature_mask;
    struct device           *dev;
    struct kempld_info      info;
    struct mutex            lock;
 };

main character struct energy, honestly. 👑

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🦋 Members 🦋

okay so every single member, one by one, no skips, we're not doing that here:

• io_base — the pointer to the IO memory. iconic pointer behaviour, it's giving "where the memory actually lives." ✨
• io_index — pointer to the IO index register. this is the index one. 🎀
• io_data — pointer to the IO data register. and this is the data one. matching set, slay. 💜
• pld_clock — the PLD clock frequency, a u32. it's literally the frequency, periodt.
• feature_mask — the PLD feature mask. features, but masked. iykyk. 🌈
• dev — pointer to the kernel device structure. the kernel device structure specifically, bestie, not a whole device, just the pointer. 😭
• info — a struct kempld_info, the KEMPLD info structure. yes the name is right there twice, it's fine, it's consistent. ⭐
• lock — the PLD mutex. it's a struct mutex. it locks. do not disrespect it. 🔥

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🌟 SEE ALSO 🌟

go look at these, they're linked and they matter:

• the kernel file ./include/linux/mfd/kempld.h
• struct kempld_info(9)
• struct kempld_platform_data(9)

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fr fr, the source lives at ./include/linux/mfd and this page is dated October 2026 — so like, future us wrote it, and she understood the assignment. 🧚💖

k byeeee, go read the header file, mwah 🎀💅🦋