STRUCT PHY_TDR_CONFIG(9)

💅 struct phy_tdr_config(9) — like, the Kernel API Manual, but make it make sense 🎀

okay so bestie, we're in the Kernel API Manual today and the vibe is very specific: this is all about one lil struct that configures a TDR raw test. lowkey iconic, highkey niche. let's get into it ✨

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🌸 NAME 🌸

struct phy_tdr_config — the configuration of a TDR raw test, periodt.

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✨ SYNOPSIS ✨

struct phy_tdr_config {
    u32 first;
    u32 last;
    u32 step;
    s8 pair;
 };

no cap, that's the whole shape of it. four lil fields, all business 🫶

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🦋 Members 🦋

• first — the distance for the first data collection point 📍
• last — the distance for the last data collection point 🏁
• step — the step between data collection points, like the spacing between them 👟
• pair — a bitmap of the cable pairs to collect data for 🧵 (yes, bitmap, she's bitmasking, iykyk)

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💖 Description 💖

so basically, this struct holds all the possible configuration parameters for a TDR cable test. it's giving "options menu" energy, honestly 🌈

the driver does not need to implement all the parameters — that's the slay part, no pressure — but it should report what is actually used. like, be honest about what you're running, bestie 🙈

and the important little detail: all distances are in centimeters 📏 literally all of them. do not come in here with inches, I'm begging 😭

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🔥 SEE ALSO 🔥

• the kernel file ./include/linux/phy.h 👑
• enum phy_interface_t(9)
• phy_modes(9)
• rgmii_clock(9)
• struct mdio_bus_stats(9)
• struct mii_bus(9)
• mdiobus_alloc(9)
• enum phy_state(9)
• struct phy_c45_device_ids(9)
• struct phy_oatc14_sqi_capability(9)
• struct phy_device(9)
• enum link_inband_signalling(9)
• struct phy_plca_cfg(9)
• struct phy_plca_status(9)
• struct phy_led(9)
• struct phy_mse_capability(9)
• struct phy_mse_snapshot(9)
• struct phy_driver(9)
• phy_id_compare(9)
• phy_id_compare_vendor(9)
• phy_id_compare_model(9)
• phydev_id_compare(9)
• phy_is_started(9)
• phy_driver_is_genphy(9)
• phy_disable_eee_mode(9)
• phy_can_wakeup(9)
• phy_may_wakeup(9)
• phy_read(9)
• __phy_read(9)
• phy_write(9)
• __phy_write(9)
• __phy_modify_changed(9)
• phy_read_mmd_poll_timeout(9)
• __phy_set_bits(9)
• __phy_clear_bits(9)
• phy_set_bits(9)
• phy_clear_bits(9)
• __phy_set_bits_mmd(9)
• __phy_clear_bits_mmd(9)
• phy_set_bits_mmd(9)
• phy_clear_bits_mmd(9)
• phy_interrupt_is_valid(9)
• phy_polling_mode(9)
• phy_has_hwtstamp(9)
• phy_has_rxtstamp(9)
• phy_has_tsinfo(9)
• phy_has_txtstamp(9)
• phy_is_default_hwtstamp(9)
• phy_on_sfp(9)
• phy_interface_mode_is_rgmii(9)
• phy_interface_mode_is_8023z(9)
• phy_interface_is_rgmii(9)
• phy_is_pseudo_fixed_link(9)
• phy_module_driver(9)

like, that's the whole friend group right there 💀 every single one of them made the list, no one got left on read 🫶

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and that's the page, bestie! 💜 this lil gem lives in ./include/linux, dated October 2026, and it's filed under struct phy_tdr_config(9) — go forth and configure your TDR raw test with main character energy 👑✨🎀