cros_ec_keyb...ister_matrix(9)

💅 cros_ec_keyb...ister_matrix(9)

okay so this is from the Kernel API Manual, and bestie, it's a short one but it's lowkey iconic. It's giving "small function, big responsibility." Let's get into it ✨

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🌸 NAME 🌸

cros_ec_keyb_register_matrix — registers matrix keys 💖

Like, it literally just does the matrix keys thing. That's the whole vibe check.

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🎀 SYNOPSIS 🎀

int cros_ec_keyb_register_matrix (struct cros_ec_keyb *ckdev );

yes, it returns an int, yes there's a space before the closing paren in the original, no we are not fixing it, periodt 💅

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🦋 ARGUMENTS 🦋

• ckdev — the keyboard device, iykyk. This is your main character right here, the struct cros_ec_keyb * you're passing in. It's the whole reason we're here fr fr 🫶

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🔥 DESCRIPTION 🔥

So what does it actually do? It handles all the bits of the keyboard driver related to matrix keys. That's it, that's the job — all those bits. The matrix-key bits specifically. Not the other bits. The matrix ones. Obsessed with the specificity ngl 💀

And the return value? Adorable. It returns 0 if there's no error, or -error upon error. So like, 0 = slay, negative = something went off and it's telling you about it 😭

ngl this description is short but every word is carrying its weight. Don't skim it. 🧚

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💜 SEE ALSO 💜

Kernel file ./drivers/input/keyboard/cros_ec_keyb.c, plus the whole squad:

• struct cros_ec_keyb(9)
• struct cros_ec_bs_map(9)
• cros_ec_keyb_report_bs(9)
• cros_ec_keyb_info(9)
• cros_ec_keyb_query_switches(9)
• cros_ec_keyb_resume(9)
• cros_ec_keyb_register_bs(9)

the whole friend group fr, go read them all if you want the full lore 🌈

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okay and last thing, the cute sign-off 💌: this page lives in ./drivers/input/keyboard and it's dated October 2026, so it's basically from the future. Future icon behavior honestly 👑✨ bye bestie, go register some matrix keys 🎀