cci_update_bits(9)

💅 cci_update_bits(9)

okay so we're in the Kernel API Manual bestie, and this is the page for cci_update_bits — literally the glow-up-your-bits function 🎀

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✨ NAME ✨

cci_update_bits — do a whole read/modify/write cycle on one single CCI register 🦋 (yes, just one, she's focused, she's main character energy)

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🌸 SYNOPSIS 🌸

int cci_update_bits (struct regmap *map , u32 reg , u64 mask , u64 val ,
       int *err );

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🎀 ARGUMENTS 🎀

• map — the register map you're updating, bestie. give her the map 🗺️
• reg — the register address to update. and listen — use the CCI_REG#() macros to encode the reg width, fr fr, don't just rawdog the number 🙈
• mask — the bitmask of the bits you wanna change ✨
• val — the shiny new value for that bitmask 💖
• err — optional pointer to store errors in. and here's the tea 🫖: if a previous error is already set, then the update gets skipped entirely. not me, not today 💀

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💅 DESCRIPTION 💅

quick vibe check: this uses read-modify-write to update the bits 🔥

⚠️ and this is the important part: atomicity with regards to other cci_*() register access functions is NOT guaranteed. like, at all. so don't come for her if two things go brr at the same time 😭

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🌈 RETURN 🌈

0 on success 💚 or a negative error code on failure 😔 periodt.

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🫶 SEE ALSO 🫶

• Kernel file ./include/media/v4l2-cci.h — go read it, iykyk 📖
• struct cci_reg_sequence(9)
• cci_read(9)
• cci_write(9)
• cci_multi_reg_write(9)
• devm_cci_regmap_init_i2c(9)

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kay that's the whole page, you ate that 💅✨ this icon lives in ./include/media and the version said October 2026 — mwah, see you in the group chat bestie 🎀🦋👑