mmc_handle_undervoltage(9)

💖 mmc_handle_undervoltage(9) — Kernel API Manual 💖

okay so bestie, welcome to the mmc_handle_undervoltage(9) page from the Kernel API Manual — it’s giving “undervoltage event on the MMC bus” realness, and we’re gonna read it together. no cap. 🦋

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🎀 NAME 🎀

mmc_handle_undervoltage — Handle an undervoltage event on the MMC bus.

✨ SYNOPSIS ✨

the signature, exactly as it is, bestie:

int mmc_handle_undervoltage (struct mmc_host *host );

🌸 ARGUMENTS 🌸

• host — The MMC host that detected the undervoltage condition.

🧚 DESCRIPTION 🧚

okay so this function is called when an undervoltage event is detected on one of the MMC regulators. that’s the whole vibe. 💅

🔥 RETURN 🔥

0 on success or a negative error code on failure. periodt. ✨

🌈 SEE ALSO 🌈

Kernel file: ./drivers/mmc/core/core.c

and these icons are all linked in the same orbit:

• mmc_request_done(9)
• mmc_cqe_request_done(9)
• mmc_cqe_post_req(9)
• mmc_is_req_done(9)
• mmc_wait_for_req(9)
• mmc_wait_for_cmd(9)
• mmc_set_data_timeout(9)
• __mmc_claim_host(9)
• mmc_release_host(9)
• mmc_vdd_to_ocrbitnum(9)
• mmc_vddrange_to_ocrmask(9)
• mmc_detect_change(9)
• mmc_erase(9)
• mmc_hw_reset(9)

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mwah 💋 this page is sourced from ./drivers/mmc/core, dated October 2026, and it’s literally the mmc_handle_undervoltage(9) page. bye bestie 🫶💖