e1000_shift_in_eec_bits(9)

💅 e1000_shift_in_eec_bits — like, the EEPROM bit-shifting one (section 9, Kernel API Manual)

okay bestie, sit down, because this one is actually kind of iconic once you get past the name 💖

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✨ NAME ✨

e1000_shift_in_eec_bits — shift data bits in from the EEPROM. that's it, that's the whole vibe 🎀

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🦋 SYNOPSIS 🦋

u16 e1000_shift_in_eec_bits (struct e1000_hw *hw , u16 count );

like yes, it returns a u16 and yes, you pass it a struct e1000_hw * and a u16 count. slay 💅

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🌸 ARGUMENTS 🌸

• hw — pointer to the HW structure. your hardware bestie, your main character struct, the one who knows things 👑
• count — number of bits to shift in. literally how many bits we're pulling in, no cap 🔥

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💫 DESCRIPTION 💫

okay so here's the tea ☕ — in order to read a register from the EEPROM, we need to shift count bits in from the EEPROM. that's the whole mission, that's the assignment 🫶

and the way bits get "shifted in"? you raise the clock input to the EEPROM — that's setting the SK bit — and then you read the value of the data out DO bit. clock goes up, we peek at DO, rinse, repeat, gorgeous ✨

🚨 important vibe check: during this whole "shifting in" process, the data in the DI bit should always be clear. like, always. do not play with it 🙈

ngl it's giving very "tiny hardware handshake" and honestly? we love her for it 💜

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🌈 SEE ALSO 🌈

• Kernel file ./drivers/net/ethernet/intel/e1000e/nvm.c — the home base, the source of truth, go read it iykyk 📖
• e1000_raise_eec_clk(9)
• e1000_lower_eec_clk(9)
• e1000_shift_out_eec_bits(9)
• e1000e_poll_eerd_eewr_done(9)
• e1000e_acquire_nvm(9)
• e1000_standby_nvm(9)
• e1000_stop_nvm(9)
• e1000e_release_nvm(9)
• e1000_ready_nvm_eeprom(9)
• e1000e_read_nvm_eerd(9)
• e1000e_write_nvm_spi(9)
• e1000_read_pba_string_generic(9)
• e1000_read_mac_addr_generic(9)
• e1000e_validate_nvm_checksum_generic(9)
• e1000e_update_nvm_checksum_generic(9)
• e1000e_reload_nvm_generic(9)

like, the whole friend group fr fr 🎀

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and that's the page!! mwah 💋 this lil doc came from ./drivers/net/ethernet/intel/e..., dated October 2026, and it's filed under e1000_shift_in_eec_bits(9) — stay hydrated, clear your DI bit, and go shift some bits bestie 💖⭐