mmc_regulator_get_ocrmask(9)

mmc_regulator_get_ocrmask(9)

okay so this page is from the Kernel API Manual — welcome to the voltage-mask lore, bestie 💖

✨ NAME ✨

mmc_regulator_get_ocrmask — return mask of supported voltages 🎀

💅 SYNOPSIS 💅

int mmc_regulator_get_ocrmask (struct regulator *supply );

🎀 ARGUMENTS 🎀

• supply — regulator to use. That's the one, bestie 🌸

🦋 DESCRIPTION 🦋

So this function returns either a negative errno or a mask of voltages that can be provided to MMC/SD/SDIO devices using the specified voltage regulator. It's literally giving "which voltages can we feed this thing" energy ✨

This would normally be called before registering the MMC host adapter — like, get the voltage tea sorted first, iykyk 🫶

🔥 SEE ALSO 🔥

The kernel file ./drivers/mmc/core/regulator.c is right there, and these linked besties are iconic:

• mmc_ocrbitnum_to_vdd(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)

xoxo, your kernel bestie 💅 — source/date check: ./drivers/mmc/core, October 2026, page mmc_regulator_get_ocrmask(9) 🦋