igb_write_nvm_spi(9)

💅 igb_write_nvm_spi — write to EEPROM using SPI ✨

okay so bestie, welcome to the igb_write_nvm_spi(9) page — that's section 9 of the Kernel API Manual, aka the deep-lore corner of the docs where the kernel devs hang out 🧚

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✨ SYNOPSIS ✨

s32 igb_write_nvm_spi (struct e1000_hw *hw , u16 offset , u16 words ,
       u16 *data );

like… look at her. she returns an s32 and takes four args. main character energy fr fr 👑

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🎀 ARGUMENTS 🎀

• hw — pointer to the HW structure 💖 that's your hardware context, the whole vibe she's working with
• offset — where inside the EEPROM we're writing to, like your little bookmark in the EEPROM 🌸
• words — how many words you're about to write, count 'em
• data — the 16 bit word(s) actually getting written to the EEPROM, the payload, the moment, the icon 🦋

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🔥 DESCRIPTION 🔥

So what does she do? She writes data to the EEPROM at offset, using the SPI interface. Simple, iconic, no notes ✨

⚠️ but bestie listen — if e1000_update_nvm_checksum is not called after this function, the EEPROM will most likely contain an invalid checksum 😭 like literally please don't forget, that's the whole plot twist of this manpage. not me warning you twice 💀

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🌈 SEE ALSO 🌈

First up, the kernel file where the magic lives:

• Kernel file ./drivers/net/ethernet/intel/igb/e1000_nvm.c

and then the whole friend group, the entire group chat, the squad 🫶:

• igb_raise_eec_clk(9)
• igb_lower_eec_clk(9)
• igb_shift_out_eec_bits(9)
• igb_shift_in_eec_bits(9)
• igb_poll_eerd_eewr_done(9)
• igb_acquire_nvm(9)
• igb_standby_nvm(9)
• e1000_stop_nvm(9)
• igb_release_nvm(9)
• igb_ready_nvm_eeprom(9)
• igb_read_nvm_spi(9)
• igb_read_nvm_eerd(9)
• igb_read_part_string(9)
• igb_read_mac_addr(9)
• igb_validate_nvm_checksum(9)
• igb_update_nvm_checksum(9)
• igb_get_fw_version(9)

(yes igb_update_nvm_checksum(9) is right there in the list — see? told you. consistency queen 👑)

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and that's the page!! source + version lives over in ./drivers/net/ethernet/intel/igb, dated October 2026, so if you're reading this from the future… hi, ily, go update your checksum 💜