m24lr_write(9)

💜 m24lr_write — the kernel API manual, bestie edition ✨

okay so this page is m24lr_write(9) from the Kernel API Manual — yes the section 9 one, kernel-internals girlies rise 🫶 — and it's literally all about pushing a buffer into an M24LR device while being polite about page alignment. let's get into it 💅

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🌸 NAME 🌸

m24lr_write — writes a buffer to the M24LR device, and it handles the page alignment stuff for you so you don't have to 😌

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✨ SYNOPSIS ✨

ssize_t m24lr_write (struct m24lr *m24lr , const u8 *buf , size_t size ,
unsigned int offset , bool is_eeprom );

like, five args, one function, zero drama. well. mostly zero 💀

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🎀 ARGUMENTS 🎀

• m24lr — pointer to the driver context. it's the vibe, it's the main character, it's the thing that knows where everything lives 👑
• buf — the data buffer you're writing. the actual content, the payload, the ~material~ 🦋
• size — how many bytes you want written. count 'em, bestie 🔢
• offset — the target register address inside the device. where in the device we're dropping this ✨
• is_eeprom — true if this write should target the EEPROM, false if it should target the system parameters sector. pick a lane, pick it correctly 🙈

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💖 DESCRIPTION 💖

so the function writes data to the M24LR device using regmap, and here's the iconic part: it splits the write into chunks that are no larger than page_size so it respects the device-specific write limitations (things like page size, or I2C hold-time concerns — real ones 😭). not me breaking a big write into cute lil bite-size pieces so the hardware doesn't get overwhelmed, we love a considerate queen.

and each one of those chunks is aligned to the page boundary defined by page_size. alignment slay. periodt 💅

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🔥 RETURN 🔥

• on success: the total number of bytes written ✅
• on failure: a negative error code if any write fails 💀 like, any single one. no partial-credit energy here.

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🧚 SEE ALSO 🧚

• Kernel file ./drivers/nvmem/m24lr.c
• struct m24lr_chip(9)
• struct m24lr(9)
• m24lr_regmap_read(9)
• m24lr_regmap_write(9)
• m24lr_write_pass(9)

go read them, iykyk 📚✨

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and that's the whole page, bestie 🍓 this icon lives in ./drivers/nvmem, and the manual's dated October 2026 — so jot that down in your notes app and go write some aligned chunks 💜🦋🌈