STRUCT MMCI_PLATFORM_DATA(9)

💅 struct mmci_platform_data(9)

okay bestie, welcome to the Kernel API Manual ✨ — yes this is the actual manual name, and yes we're gonna get through it together, i promise it's short and honestly kind of iconic.

This one's all about platform configuration for the MMCI block — also known as PL180, so if you see that name floating around, same thing, no cap 🫶

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✨ NAME ✨

struct mmci_platform_data — the platform configuration for the MMCI (also known as PL180) block. that's it, that's the whole vibe 🎀

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🌸 SYNOPSIS 🌸

struct mmci_platform_data {
    unsigned int ocr_mask;
    unsigned int (*status)(struct device *);
 };

look at her. two members. main character energy, no notes 💅

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👑 Members 👑

• ocr_mask — this is the available voltages on the 4 pins from the block. heads up tho 🫶 it gets ignored if a regulator is used — so like, if you've got a regulator handling it, this lil field is just sitting there, unbothered. for the real deal, peep the MMC_VDD_* masks in mmc/host.h.
• status — a function pointer, and here's the teа: if no GPIO line was given to the block, this function gets called to determine whether a card is present in the MMC slot or not. so it's the "is there a card in there bestie??" check 😭🦋 called as unsigned int (*status)(struct device *); — device pointer in, answer out.

honestly the whole struct is giving "minimal effort, maximum correctness" and i respect it 💖

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🌈 SEE ALSO 🌈

• Kernel file ./include/linux/amba/mmci.h — go read it, it's literally right there, iykyk 📖✨

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and that's the page!! 🎀 source lives in ./include/linux/amba, dated October 2026, and that's your lil sign-off bestie — go configure some MMC platforms, you absolute legend 👑💜