rmi_write_block(9)

💅 rmi_write_block(9) — from the Kernel API Manual, bestie ✨

okay so picture this: you're deep in the kernel, you've got a whole block of bytes and you need them to go somewhere. that's literally this function. it's in section 9 of the Kernel API Manual and it's lowkey iconic for how much it just… does its job 🫶

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🌸 NAME 🌸

rmi_write_block — write a block of bytes 💖

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✨ SYNOPSIS ✨

int rmi_write_block (struct rmi_device *d , u16 addr , const void *buf ,
       size_t len );

like, that's the whole signature. four args. no cap. 🔥

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🎀 ARGUMENTS 🎀

• d — Pointer to an RMI device 💫 like, which device are we even talking to, bestie
• addr — The start address to write to 📍 the spot where the writing begins
• buf — The write buffer 🧺 your bytes live here, they're ready to travel
• len — Length of the write buffer 📏 how many bytes we're sending out into the world

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🦋 DESCRIPTION 🦋

Writes a block of byte data from buf using the underlaying transport protocol ⭐ yeah, the underlaying one, spelling and all, that's how it's written and we respect it 💜

it returns the amount of bytes written or a negative error code 🌈 so like. check that return value, fr fr. positive-ish = good, negative = the vibe check failed 😭

ngl, if you're staring at a negative number wondering what went wrong, that's your error code talking. it's giving "read the return value" energy 💀

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👑 SEE ALSO 👑

• Kernel file ./drivers/input/rmi4/rmi_bus.h — the header, the source of truth, the main character 📜
• struct rmi_function(9)
• struct rmi_function_handler(9)
• rmi_reset(9)
• rmi_read(9)
• rmi_read_block(9)
• rmi_write(9)

like, go read the whole friend group, they all hang out together 🫶✨

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and that's the page!! 💅 this little gem lives in ./drivers/input/rmi4, dated October 2026 — mwah, see you in the next manpage, bestie 🍓🧚💖