ksz8_r_phy_ctrl(9)

💅 ksz8_r_phy_ctrl — like, the Kernel API Manual page, bestie 💅

okay so real talk, this is a page from the Kernel API Manual — yes, that one — and it's all about ksz8_r_phy_ctrl(9). pull up a chair 🎀

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✨ NAME ✨

ksz8_r_phy_ctrl — it translates stuff and then reads from the SMI interface into a MIIM PHY Control register (that's Reg. 31, iykyk). literally its whole personality 🦋

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✨ SYNOPSIS ✨

int ksz8_r_phy_ctrl (struct ksz_device *dev , int port , u16 *val );

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✨ ARGUMENTS ✨

• dev — the KSZ device instance 💜 like, the actual device we're talking to.
• port — the port number you wanna read. which port? that one. 🙈
• val — the value that got read out of the SMI interface. it comes back to you through this pointer, periodt.

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✨ DESCRIPTION ✨

so what this function does is it reads the SMI interface, and then it translates the hardware register bit values into the matching control settings for a MIIM PHY Control register ✨ like it's giving translator, it's giving bridge between hardware-speak and control-setting-speak, and honestly? obsessed 🫶

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✨ RETURN ✨

• 0 — success, slay 💖
• an error code — failure, and we don't talk about it 😭

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✨ SEE ALSO ✨

check out the kernel file ./drivers/net/dsa/microchip/ksz8.c 🌸 and also these icons:

• ksz8_ind_write8(9)
• ksz8_ind_read8(9)
• ksz879x_get_loopback(9)
• ksz879x_set_loopback(9)
• ksz8_r_phy_bmcr(9)
• ksz8_w_phy_ctrl(9)
• ksz8_w_phy_bmcr(9)
• ksz88x3_tc_ets_add(9)
• ksz88x3_tc_ets_del(9)
• ksz8_phy_port_link_up(9)
• ksz8_cpu_port_link_up(9)
• ksz88x3_drive_strength_write(9)
• ksz8_parse_drive_strength(9)

like, that's the whole friend group right there 💀🔥

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ngl bestie, this page lives in ./drivers/net/dsa/microchip and it's dated October 2026, and the source/version vibes are all ksz8_r_phy_ctrl(9) — mwah 💋 go read it, it ate 🌈⭐👑