RK_GPIO(4)

📦 version 15.1, in freebsd 14.5, freebsd 15.1

💖 rk_gpio — the RockChip GPIO driver, explained bestie-style 💖

okay so this is rk_gpio(4), and it lives in the Kernel Interfaces Manual section of the FreeBSD docs (section 4 = kernel interfaces, iykyk). it's a device driver page, it's short, it's iconic, and honestly the way it does exactly one thing and does it well is main character energy. let's get into it ✨

🌸 NAME 🌸

rk_gpio — the driver for the gpio controller on RockChip SoCs 🫶

like, SoC = system on a chip, and this little guy is the one talking to the GPIO controller on RockChip ones. that's it. that's the whole vibe. 💅

🎀 SYNOPSIS 🎀

options SOC_ROCKCHIP_RK3328

yes bestie, that's the whole synopsis. one line. it's giving minimalist. you drop that options SOC_ROCKCHIP_RK3328 into your kernel config and boom, you're in business. no cap. 🔥

🦋 DESCRIPTION 🦋

so the rk_gpio device driver provides support for the gpio controller device that's present on RockChip SoC. 🌈

that's literally it — that's the job, that's the whole assignment, and it ate. it handles GPIO on RockChip silicon, which means pins you can poke at from userspace (hi gpioctl(8), we'll get to you 👀). lowkey a glow-up for your board. ✨

💜 HARDWARE 💜

the current version of the rk_gpio driver supports the gpio banks with one of the following compatible strings:

  • rockchip,gpio-bank ⭐
so fr fr, if your device tree has that compatible string, the driver's gonna vibe check it and say "yeah that's mine." if it doesn't, don't come crying to me. 🥲

🔍 SEE ALSO 🔍

  • gpiobus(4) — the bus your gpio stuff hangs out on 🚌
  • gpioctl(8) — the userspace tool where you actually poke the pins 👆

go read them, they're friends of this page. iykyk. 💖

🕰️ HISTORY 🕰️

the rk_gpio device driver first appeared in FreeBSD 12.0. 🎀

a classic, an original, a founding mother. we respect her. 👑

👑 AUTHORS 👑

the rk_gpio device driver and this manpage were written by Emmanuel Vadot <manu@freebsd.org>. 🫶

writing the driver AND the docs? that's not just main character energy, that's main character energy with a side of "i'll do it myself." we stan a contributor who documents their own work. 💜

🌟 cute sign-off 🌟

and that's the page, bestie! this one came to you from the Debian side of things, dated Apr 26, 2018, and it's the RK_GPIO(4) manual page — no cap, go forth and blink an LED for me. 🦋🌸💅

reminder: the facts above are the facts above — every option, string, version and name was kept exactly, i just added the sparkle ✨
📦 where this page comes from