GPIO LED FUNCTIONS(9)

💅 GPIO/LED functions(9) ✨

okay so this is the Kernel API Manual page, and literally the whole vibe is: we're driving pins. pull up a chair bestie 🫶

🎀 the whole point

Here we control the 6 bidirectional GPIO pins provided by the hw. That's it, that's the job. We can set a GPIO pin to be an input or an output pin on the GPIO control register — and then read or set its status from the GPIO data input/output registers. in 👏 put 👏 out 👏 registers. slay.

We also control the two LED pins provided by the hw:

• LED_0 is our "power" LED 🔥
• LED_1 is our "network activity" LED 🦋

but honestly, many scenarios are available from hw — the hw has range, iykyk.

Also! Vendors might provide LEDs connected to the GPIO pins (not me checking the vendor docs 😭), and we handle them through the LED subsystem on led.c. periodt.

🌈 SEE ALSO 🌈

Kernel file ./drivers/net/wireless/ath/ath5k/gpio.c ✨

• ath5k_hw_set_ledstate(9)
• ath5k_hw_set_gpio_input(9)
• ath5k_hw_set_gpio_output(9)
• ath5k_hw_get_gpio(9)
• ath5k_hw_set_gpio(9)
• ath5k_hw_set_gpio_intr(9)

go read those too bestie, they're the whole friend group 💖

and that's the page!! courtesy of ./drivers/net/wireless/ath/ath5k, dated October 2026, living under the title GPIO/LED functions(9) — see you in the next one, mwah 💋👑