led_update_brightness(9)

✨ NAME ✨

Bestie, meet led_update_brightness(9) — the Kernel API Manual page for the little glow-up function that updates LED brightness. 💡✨

🌈 SYNOPSIS 🌈

Okay so here’s the whole signature, no cap:

int led_update_brightness (struct led_classdev *led_cdev );

🎀 ARGUMENTS 🎀

• led_cdev — the LED to query. That’s the one we’re checking on, bestie. 👀💖

💅 DESCRIPTION 💅

So what it does is: it gets an LED’s current brightness, then updates the led_cdev->brightness member with the obtained value. That’s the whole vibe — read the brightness, stash it in the struct member. ✨🦋

🔥 RETURN 🔥

It returns 0 on success, or a negative error value on failure. Slay when it’s 0, not slay when it’s negative. 😭💀

🦋 SEE ALSO 🦋

Go look at these besties too, iykyk:

• Kernel file ./include/linux/leds.h
• struct led_lookup_data(9)
• led_classdev_register_ext(9)
• led_classdev_register(9)
• led_blink_set(9)
• led_blink_set_nosleep(9)
• led_blink_set_oneshot(9)
• led_set_brightness(9)
• led_set_brightness_sync(9)
• led_mc_set_brightness(9)
• led_get_default_pattern(9)
• led_sysfs_disable(9)
• led_sysfs_enable(9)
• led_compose_name(9)
• led_get_color_name(9)
• led_sysfs_is_disabled(9)
• struct led_pattern(9)

mwah 💋 — this page is sourced from ./include/linux, dated October 2026, and it’s the led_update_brightness(9) manual page. Bye bestie! 🫶🌸