OPERATION OF GPIO(9)

💅 Operation of gpio — Kernel API Manual edition ✨

Okay so this is Operation of gpio(9) from the Kernel API Manual, and it is literally here to provide the api of gpiochip for the chardev interface 🫶. There are two types of api, bestie, and they are not giving the same energy.

🌀 Type one: the ioctl-matching one

The first one provides the same function as each ioctl, including request and release for lines of gpio, plus read/write the value of gpio. If the user wants to do lots of read and write of lines of gpio, the user should use this type of api. Periodt 💅.

🦋 Type two: the easy one

The second one provides the easy-to-use api for the user. Each of the following api will request gpio lines, do the operation, and then release these lines. Iconic little request-do-release routine, no cap ✨.

👀 SEE ALSO

Kernel file ./tools/gpio/gpio-utils.c — and these cuties right here:

• gpiotools_request_line(9)
• gpiotools_set_values(9)
• gpiotools_get_values(9)
• gpiotools_release_line(9)
• gpiotools_get(9)
• gpiotools_gets(9)
• gpiotools_set(9)
• gpiotools_sets(9)

Cute little sign-off: this page is sourced from ./tools/gpio, dated October 2026, and it's Operation of gpio(9) 🎀💖✨