hidpp10_set_register(9)

✨ NAME ✨

hidpp10_set_register — bestie, this is the one that modifies a HID++ 1.0 register 💅 (yes, that's section 9 of the Kernel API Manual, we're in the big leagues now 👑)

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🌸 SYNOPSIS 🌸

int hidpp10_set_register (struct hidpp_device *hidpp_dev , u8
register_address , u8 byte , u8 mask , u8 value );

okay so like, it hands you back an int at the end, we'll get to that 🫶

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🦋 ARGUMENTS 🦋

• hidpp_dev — the device you're setting the register on. your main character device, if you will 💖
• register_address — the address of the register you wanna modify. it's giving "the vibe check location" 📍
• byte — which byte of that register you're modifying. and listen — this one should be less than 3. no cap, keep it under 3 or it's not it 🙈
• mask — the mask of the bits you're gonna modify. like a little stencil for which bits get the glow-up ✨
• value — the new values for the bits in mask. this is the actual tea being spilled 🍓

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💀 RETURN 💀

So it returns 0 if it worked — slay, iconic, ate 💅 — and otherwise you get a negative error code. sad girl hours 😭 Fr fr, anything that isn't 0 means something went sideways.

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🌈 SEE ALSO 🌈

• ./drivers/hid/hid-logitech-hidpp.c — the kernel file itself, go read it, it's lowkey a whole journey 🧚
• struct hidpp_scroll_counter(9) — the struct, very demure, very mindful 🎀
• hidpp_scroll_counter_handle_scroll(9) — the scroll handler, its bestie 🫶

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⭐ real talk: byte should be less than 3. that's not me being dramatic, that's just what the page says and i would never lie to you 💜

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and that's the whole thing, bestie!! this page is from ./drivers/hid 🐇 dated October 2026 — like, future vibes, we love to see it. go forth and set those registers, you've absolutely got this 🔥👑💖