mmc_of_parse_voltage(9)

✨ mmc_of_parse_voltage(9) ✨

okay so bestie, welcome to the Kernel API Manual — this is the whole vibe on mmc_of_parse_voltage, and honestly? it's giving "small function, big responsibility" 💅

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🌸 NAME 🌸

mmc_of_parse_voltage — return mask of supported voltages

🦋 SYNOPSIS 🦋

int mmc_of_parse_voltage (struct mmc_host *host , u32 *mask );

🎀 ARGUMENTS 🎀

• host — the host whose properties should be parsed. yes, that host 🫶
• mask — mask of voltages available for MMC/SD/SDIO ✨

👑 DESCRIPTION 👑

So here's the tea ☕ — this function parses the "voltage-ranges" property. That's literally its whole main character moment.

And it returns one of three things, no cap:

1. zero — if the property is not found 🙈
2. a negative errno — if the voltage-range specification is invalid 💀
3. one — if the voltage-range is specified and successfully parsed 🎉

like, it ate and left no crumbs. three exits, all accounted for, fr fr.

🔥 SEE ALSO 🔥

Kernel file ./drivers/mmc/core/host.c — and while you're in the neighborhood, go say hi to these icons 👑:

• mmc_retune_enable(9)
• mmc_retune_disable(9)
• mmc_of_parse(9)
• mmc_first_nonreserved_index(9)
• mmc_alloc_host(9)
• mmc_add_host(9)
• mmc_remove_host(9)
• mmc_free_host(9)

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okay that's the whole page bestie, go forth and parse those voltage ranges responsibly 🧚💜

source: ./drivers/mmc/core · dated: October 2026 · and that's the sign-off, mwah 💋 slay