mmc_ocrbitnum_to_vdd(9)

💖 mmc_ocrbitnum_to_vdd 💖

okay so bestie, welcome to the Kernel API Manual corner where we translate one lil OCR bit number into its voltage vibe. This is mmc_ocrbitnum_to_vdd(9), and it’s giving “small helper, big regulator energy” ✨.

🌸 NAME 🌸

mmc_ocrbitnum_to_vdd — convert a OCR bit number to its voltage 💅

✨ SYNOPSIS ✨

int mmc_ocrbitnum_to_vdd (int vdd_bit , int *min_uV , int *max_uV );

🎀 ARGUMENTS 🎀

• vdd_bit — the OCR bit number, aka the lil number we’re converting.
• min_uV — minimum voltage value (mV) 🫶
• max_uV — maximum voltage value (mV) 🫶

🦋 DESCRIPTION 🦋

So like, this function returns the voltage range according to the provided OCR bit number. That’s the whole assignment, no cap. If conversion is not possible, a negative errno value is returned 😭 — so watch for that negative signal instead of a happy voltage range.

🔥 SEE ALSO 🔥

Kernel file ./drivers/mmc/core/regulator.c is where the lore lives, and here’s the whole bestie lineup:

• mmc_regulator_get_ocrmask(9)
• mmc_regulator_set_ocr(9)
• mmc_regulator_set_vqmmc(9)
• mmc_regulator_set_vqmmc2(9)
• mmc_regulator_register_undervoltage_notifier(9)
• mmc_regulator_unregister_undervoltage_notifier(9)
• mmc_regulator_get_supply(9)
• mmc_regulator_enable_vqmmc(9)
• mmc_regulator_disable_vqmmc(9)

and that’s the whole page, bestie 🎀 — signed off from ./drivers/mmc/core, dated October 2026, and obvi titled mmc_ocrbitnum_to_vdd(9) 💖✨