devm_regmap_init_mdio(9)

🎀 devm_regmap_init_mdio(9) — the managed-regmap glow-up, MDIO edition 🎀

okay so bestie, welcome to devm_regmap_init_mdio from the Kernel API Manual ✨ this is the one that sets you up with a register map over MDIO and handles the cleanup for you, because we do not do manual regmap_exit in this house 💅

✨ SYNOPSIS ✨

devm_regmap_init_mdio (mdio_dev , config );

🌸 ARGUMENTS 🌸

• mdio_dev — the device you're gonna be interacting with 🫶 like, that's your buddy for the whole operation
• config — the configuration for the register map 🎀 everything it needs to know about how you want it set up

💖 DESCRIPTION 💖

so what do you even get back? the return value is gonna be an ERR_PTR on error 😭 or, if the vibes are correct, a valid pointer to a struct regmap 👑 and here's the iconic part: that regmap gets automatically freed by the device management code ✨ not you. never you. the managed-devm machinery is the main character here and she's got it fr fr 💅

lowkey the whole point: you get the register map, you forget about it, device management handles the goodbye 🦋

🌈 SEE ALSO 🌈

Kernel file ./include/linux/regmap.h — and here's the whole friend group, no cap, every single one:

• struct reg_default(9)
• struct reg_sequence(9)
• regmap_read_poll_timeout(9)
• regmap_read_poll_timeout_atomic(9)
• regmap_field_read_poll_timeout(9)
• struct regmap_range(9)
• struct regmap_access_table(9)
• struct regmap_config(9)
• struct regmap_range_cfg(9)
• struct regmap_sdw_mbq_cfg(9)
• struct regmap_bus(9)
• regmap_init(9)
• regmap_init_i2c(9)
• regmap_init_mdio(9)
• regmap_init_sccb(9)
• regmap_init_slimbus(9)
• regmap_init_spi(9)
• regmap_init_spmi_base(9)
• regmap_init_spmi_ext(9)
• regmap_init_w1(9)
• regmap_init_mmio_clk(9)
• regmap_init_mmio(9)
• regmap_init_ac97(9)
• regmap_init_sdw(9)
• regmap_init_sdw_mbq(9)
• regmap_init_sdw_mbq_cfg(9)
• regmap_init_i3c(9)
• regmap_init_spi_avmm(9)
• regmap_init_fsi(9)
• devm_regmap_init(9)
• devm_regmap_init_i2c(9)
• devm_regmap_init_sccb(9)
• devm_regmap_init_spi(9)
• devm_regmap_init_spmi_base(9)
• devm_regmap_init_spmi_ext(9)
• devm_regmap_init_w1(9)
• devm_regmap_init_mmio_clk(9)
• devm_regmap_init_mmio(9)
• devm_regmap_init_ac97(9)
• devm_regmap_init_sdw(9)
• devm_regmap_init_sdw_mbq(9)
• devm_regmap_init_sdw_mbq_cfg(9)
• devm_regmap_init_slimbus(9)
• devm_regmap_init_i3c(9)
• devm_regmap_init_spi_avmm(9)
• devm_regmap_init_fsi(9)
• struct reg_field(9)
• struct regmap_irq_type(9)
• struct regmap_irq(9)
• struct regmap_irq_chip(9)

and that's the whole page, bestie 🍓 this lil drop of documentation lives in ./include/linux, dated October 2026, and it's filed under devm_regmap_init_mdio(9) 💜 go forth and init some managed register maps, you absolute icon 🧚