e1000_check_polarity_m88(9)

🎀 e1000_check_polarity_m88 — the polarity check, bestie edition 🎀

okay so this is a page out of the Kernel API Manual, section 9 — the e1000_check_polarity_m88(9) entry, and it's basically the "hey, which way 'round is this cable?" girlie of the e1000e PHY world. pull up a chair 💅

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✨ NAME ✨

e1000_check_polarity_m88 — checks the polarity. that's it. that's the whole job. she checks the polarity. 🦋

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🌸 SYNOPSIS 🌸

s32 e1000_check_polarity_m88 (struct e1000_hw *hw );

like, you hand her a pointer and she hands you back an s32. simple as. no cap.

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💖 ARGUMENTS 💖

• hw — pointer to the HW structure. yes queen, the hardware struct, you know the one 🫶

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🔥 DESCRIPTION 🔥

here's the tea, and it's honestly so straightforward it's giving main character energy for zero reason:

Success returns 0, Failure returns -E1000_ERR_PHY (-2) 💀

so if it works, you get a precious little 0 and everyone claps. if it doesn't, you get -E1000_ERR_PHY, which is -2 in case you were wondering, and it's the sad little "the PHY said no" code. 😭

and how does she figure out the polarity, you ask? Polarity is determined based on the PHY specific status register. that's the whole method. she reads that register, she knows what's up. iykyk ✨

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👑 SEE ALSO 👑

alright bestie, brace yourself, because this list is LONG and she is not doing it alone — literally the entire PHY.c friend group showed up 🌈

the kernel file: ./drivers/net/ethernet/intel/e1000e/phy.c

and now, the whole entire squad, in order, no one gets left out:

e1000e_check_reset_block_generic(9), e1000e_get_phy_id(9), e1000e_phy_reset_dsp(9), e1000e_read_phy_reg_mdic(9), e1000e_write_phy_reg_mdic(9), e1000e_read_phy_reg_m88(9), e1000e_write_phy_reg_m88(9), e1000_set_page_igp(9), __e1000e_read_phy_reg_igp(9), e1000e_read_phy_reg_igp(9), e1000e_read_phy_reg_igp_locked(9), __e1000e_write_phy_reg_igp(9), e1000e_write_phy_reg_igp(9), e1000e_write_phy_reg_igp_locked(9), __e1000_read_kmrn_reg(9), e1000e_read_kmrn_reg(9), e1000e_read_kmrn_reg_locked(9), __e1000_write_kmrn_reg(9), e1000e_write_kmrn_reg(9), e1000e_write_kmrn_reg_locked(9), e1000_set_master_slave_mode(9), e1000_copper_link_setup_82577(9), e1000e_copper_link_setup_m88(9), e1000e_copper_link_setup_igp(9), e1000_phy_setup_autoneg(9), e1000_copper_link_autoneg(9), e1000e_setup_copper_link(9), e1000e_phy_force_speed_duplex_igp(9), e1000e_phy_force_speed_duplex_m88(9), e1000_phy_force_speed_duplex_ife(9), e1000e_phy_force_speed_duplex_setup(9), e1000e_set_d3_lplu_state(9), e1000e_check_downshift(9), e1000_check_polarity_igp(9), e1000_check_polarity_ife(9), e1000_wait_autoneg(9), e1000e_phy_has_link_generic(9), e1000e_get_cable_length_m88(9), e1000e_get_cable_length_igp_2(9), e1000e_get_phy_info_m88(9), e1000e_get_phy_info_igp(9), e1000_get_phy_info_ife(9), e1000e_phy_sw_reset(9), e1000e_phy_hw_reset_generic(9), e1000e_get_cfg_done_generic(9), e1000e_phy_init_script_igp3(9), e1000e_get_phy_type_from_id(9), e1000e_determine_phy_address(9), e1000_get_phy_addr_for_bm_page(9), e1000e_write_phy_reg_bm(9), e1000e_read_phy_reg_bm(9), e1000e_read_phy_reg_bm2(9), e1000e_write_phy_reg_bm2(9), e1000_enable_phy_wakeup_reg_access_bm(9), e1000_disable_phy_wakeup_reg_access_bm(9), e1000_access_phy_wakeup_reg_bm(9), e1000_power_up_phy_copper(9), e1000_power_down_phy_copper(9), __e1000_read_phy_reg_hv(9), e1000_read_phy_reg_hv(9), e1000_read_phy_reg_hv_locked(9), e1000_read_phy_reg_page_hv(9), __e1000_write_phy_reg_hv(9), e1000_write_phy_reg_hv(9), e1000_write_phy_reg_hv_locked(9), e1000_write_phy_reg_page_hv(9), e1000_get_phy_addr_for_hv_page(9), e1000_access_phy_debug_regs_hv(9), e1000_link_stall_workaround_hv(9), e1000_check_polarity_82577(9), e1000_phy_force_speed_duplex_82577(9), e1000_get_phy_info_82577(9), e1000_get_cable_length_82577(9)

like… the way that's basically a whole group chat in one SEE ALSO section?? obsessed. 🔥

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and that's the whole page, bestie — short, sweet, and fully cited. anyway, this cutie right here comes from ./drivers/net/ethernet/intel/e... and the date on her little name tag is October 2026, under the title e1000_check_polarity_m88(9) one last time for the road. periodt 💜🌸