phy_get_tx_polarity(9)

💅 phy_get_tx_polarity

okay so bestie, ever wondered which way your TX lane is pointing?? this is the kernel API manual page for phy_get_tx_polarity, and yes, it's giving "niche but iconic" ✨ it lives in section 9 (kernel API manual), so it's for the real ones writing driver code 🫶

---

✨ NAME ✨

phy_get_tx_polarity — get the TX polarity for a PHY differential lane 🌸

like, is the lane normal? is it inverted? this function is literally the vibe check for that.

---

🎀 SYNOPSIS 🎀

int phy_get_tx_polarity (struct fwnode_handle *fwnode , const char
       *mode_name , unsigned int supported , unsigned int default_val ,
       unsigned int *val );

no cap, that's five arguments, so buckle up 🦋

---

🔥 ARGUMENTS 🔥

• fwnode — pointer to the PHY's firmware node. this is where the info comes from, main character energy 💜
• mode_name — the name of the PHY mode to look up 👑
• supported — bit mask of PHY_POL_NORMAL and PHY_POL_INVERT ⭐
• default_val — default polarity value if the property is missing 🙈 (yes, there's a fallback, we love a safety net)
• val — pointer to the returned polarity 💖 this is where the answer lands

---

🌈 RETURN 🌈

zero on success, negative error on failure 💀 that's it, that's the whole contract — 0 means slay, negative means something went wrong, periodt.

---

🦋 SEE ALSO 🦋

• kernel file ./drivers/phy/phy-common-props.c 📁
• fwnode_get_u32_prop_for_name(9)
• phy_get_rx_polarity(9)
• phy_get_manual_rx_polarity(9)
• phy_get_manual_tx_polarity(9)

iykyk — if you're messing with one polarity getter, you're probably gonna want the whole friend group 💅

---

okurrr that's the whole page bestie 🎀 this gem comes from ./drivers/phy, dated October 2026, and it's the phy_get_tx_polarity(9) kernel API manual page — go forth and get that polarity, you've got this fr fr 💖✨