ixgbe_get_i2c_data(9)

💅 ixgbe_get_i2c_data(9) — Kernel API Manual, but make it make sense

okay so bestie, welcome to the glow-up edition of the ixgbe_get_i2c_data(9) page from the Kernel API Manual ✨ this one's short and sweet but she's important, so pay attention 🫶

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✨ NAME ✨

ixgbe_get_i2c_data — reads the I2C SDA data bit 💫 literally her whole job, and she does it flawlessly, no cap

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🌸 SYNOPSIS 🌸

bool ixgbe_get_i2c_data (struct ixgbe_hw *hw , u32 *i2cctl );

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🎀 ARGUMENTS 🎀

• hw — pointer to hardware structure 💻 like, the whole vibe of the card, handed to you directly
• i2cctl — current value of the I2CCTL register 📋 she's showing up with the receipts already in hand, we love a prepared queen

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🦋 DESCRIPTION 🦋

She returns the I2C data bit value 🔥 that's it, that's the plot, and she ate.

also — and this is the part you cannot skip, bestie — she negates the I2C data output enable on X550 hardware 🙈 so if you're on X550, the output enable gets flipped, and you're just gonna have to accept that, periodt.

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💜 SEE ALSO 💜

the whole group chat 😭 so many icons in here, every single one of them:

• I2C byte acknowledgement squad: ixgbe_out_i2c_byte_ack(9), ixgbe_in_i2c_byte_ack(9), ixgbe_ones_comp_byte_add(9)
• combined I2C reads & writes: ixgbe_read_i2c_combined_generic_int(9), ixgbe_write_i2c_combined_generic_int(9)
• PHY discovery & reset crew: ixgbe_probe_phy(9), ixgbe_identify_phy_generic(9), ixgbe_check_reset_blocked(9), ixgbe_get_phy_id(9), ixgbe_get_phy_type_from_id(9), ixgbe_reset_phy_generic(9)
• PHY register access besties: ixgbe_read_phy_reg_mdi(9), ixgbe_read_phy_reg_generic(9), ixgbe_write_phy_reg_mdi(9), ixgbe_write_phy_reg_generic(9)
• miscellaneous main characters: ixgbe_msca_cmd(9)
• MII bus — generic flavour: ixgbe_mii_bus_read_generic_c22(9), ixgbe_mii_bus_read_generic_c45(9), ixgbe_mii_bus_write_generic_c22(9), ixgbe_mii_bus_write_generic_c45(9)
• MII bus — the regular ones: ixgbe_mii_bus_read_c22(9), ixgbe_mii_bus_read_c45(9), ixgbe_mii_bus_write_c22(9), ixgbe_mii_bus_write_c45(9)
• MII bus — the x550em_a limited editions: ixgbe_x550em_a_mii_bus_read_c22(9), ixgbe_x550em_a_mii_bus_read_c45(9), ixgbe_x550em_a_mii_bus_write_c22(9), ixgbe_x550em_a_mii_bus_write_c45(9)
• x550em_a lore: ixgbe_get_first_secondary_devfn(9), ixgbe_x550em_a_has_mii(9), ixgbe_mii_bus_init(9)
• link setup era: ixgbe_setup_phy_link_generic(9), ixgbe_setup_phy_link_speed_generic(9), ixgbe_get_copper_speeds_supported(9), ixgbe_get_copper_link_capabilities_generic(9), ixgbe_check_phy_link_tnx(9), ixgbe_setup_phy_link_tnx(9), ixgbe_reset_phy_nl(9)
• module identification committee: ixgbe_identify_module_generic(9), ixgbe_identify_sfp_module_generic(9), ixgbe_identify_qsfp_module_generic(9), ixgbe_get_sfp_init_sequence_offsets(9)
• EEPROM & SFF access: ixgbe_read_i2c_eeprom_generic(9), ixgbe_read_i2c_sff8472_generic(9), ixgbe_write_i2c_eeprom_generic(9), ixgbe_is_sfp_probe(9)
• I2C byte reads: ixgbe_read_i2c_byte_generic_int(9), ixgbe_read_i2c_byte_generic(9), ixgbe_read_i2c_byte_generic_unlocked(9)
• I2C byte writes: ixgbe_write_i2c_byte_generic_int(9), ixgbe_write_i2c_byte_generic(9), ixgbe_write_i2c_byte_generic_unlocked(9)
• the bit-banging icons: ixgbe_i2c_start(9), ixgbe_i2c_stop(9), ixgbe_clock_in_i2c_byte(9), ixgbe_clock_out_i2c_byte(9), ixgbe_get_i2c_ack(9), ixgbe_clock_in_i2c_bit(9), ixgbe_clock_out_i2c_bit(9), ixgbe_raise_i2c_clk(9), ixgbe_lower_i2c_clk(9), ixgbe_set_i2c_data(9), ixgbe_i2c_bus_clear(9)
• and finally, the overtemp check: ixgbe_tn_check_overtemp(9)

and don't forget the kernel file itself, bestie — ./drivers/net/ethernet/intel/ixgbe/ixgbe_phy.c 📁 that's where she lives 🏡💖

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fr fr the only tricky bit: that X550 negation of the data output enable is real behaviour, not a typo, so don't go "fixing" it 🙈

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and that's the page!! 🎀 this little drop came from ./drivers/net/ethernet/intel/i... (she's the source/version, iykyk 👑) and it's dated October 2026 ⭐ so you know it's fresh — mwah, drink some water, and go read the other 64 pages in SEE ALSO 💜🦋💅