write_i2c_reg(9)

💅 write_i2c_reg(9) — Kernel API Manual 💅

okay so bestie, welcome to write_i2c_reg(9) from the Kernel API Manual. this one is short and sweet: we’re writing to an internal i2c register, and we’re keeping every lil detail. periodt. 🫶✨

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💖 NAME 💖

write_i2c_reg — writes to an internal i2c register 🌸

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✨ SYNOPSIS ✨

int write_i2c_reg (void __iomem *addr , u8 index , u8 data );

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🎀 ARGUMENTS 🎀

• addr — dt3155 mmio base address 🏠
• index — index (internal address) of register to read 👀
• data — data to be written ✍️

and yes, the index line literally says “to read” even though this whole page is about writing — I’m not fixing it, bestie, I’m just delivering the facts exactly as they are. 😭

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🔥 RETURN 🔥

returns zero on success or error code 💀 so: success = zero ✅, error = error code 😭. no cap.

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🦋 DESCRIPTION 🦋

This function starts writing the specified (by index) register and busy waits for the process to finish. ⏳ like, it starts the write and then busy waits — busy-wait main character energy, fr fr.

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🌈 SEE ALSO 🌈

• Kernel file ./drivers/media/pci/dt3155/dt3155.c 📁
• read_i2c_reg(9)
• write_i2c_reg_nowait(9)
• wait_i2c_reg(9)

iykyk, go check those out too 💅

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mwah 💋 — this page lives under ./drivers/media/pci/dt3155, dated October 2026, and it’s for write_i2c_reg(9). bye bestie, go write that register! 🎀✨