hns_mdio_write_c22(9)

💅 hns_mdio_write_c22 — access phy register 🎀

okay so bestie, this one lives in the Kernel API Manual (section 9, kernel-level stuff, iykyk) and honestly? she's a little one. a tiny icon. a single job. but we stan a focused main character ✨

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✨ SYNOPSIS ✨

int hns_mdio_write_c22 (struct mii_bus *bus , int phy_id , int regnum ,
       u16 data );

that's it. that's the whole vibe. five things go in, one int comes out 🫶

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🌸 ARGUMENTS 🌸

• bus — the mdio bus, aka the whole friend group this phy is hanging out on 🚌
• phy_id — the phy id, so we know which friend we're talking to 💖
• regnum — register num, the exact spot inside them we're poking 👀
• data — register value, the actual thing we're putting there (it's a u16, no cap) 🍓

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🦋 DESCRIPTION 🦋

so basically: this is write energy for a phy register over c22. the whole entire summary is —

Return 0 on success, negative on failure 😭

that's the tea. 0? slay, it worked. negative? not slay, something's wrong, but she's telling you about it 💀

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👑 SEE ALSO 👑

like the rest of the squad, fr fr:

• Kernel file ./drivers/net/ethernet/hisilicon/hns_mdio.c
• hns_mdio_write_c45(9)
• hns_mdio_read_c22(9)
• hns_mdio_read_c45(9)
• hns_mdio_reset(9)
• hns_mdio_probe(9)
• hns_mdio_remove(9)

the c45 girlies are right there if you need them, just saying 💅

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mwah 💜 that's the page! brought to you by the fine people at ./drivers/net/ethernet/hisilicon, dated October 2026 — go forth and write your registers, bestie, and remember: check the return value. always. 🧚‍♀️🌈⭐