ksz879x_get_loopback(9)

💖 ksz879x_get_loopback(9) 💖

hii bestie, welcome to the ksz879x_get_loopback(9) page from the Kernel API Manual ✨ this one is short, sweet, and lowkey iconic.

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💅 NAME 💅

ksz879x_get_loopback — the KSZ879x specific function to get loopback configuration status for a specific port 👑

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✨ SYNOPSIS ✨

okay so here's the signature, exactly as it appears, no cap:

int ksz879x_get_loopback (struct ksz_device *dev , u16 port , u16 *val
);

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🎀 ARGUMENTS 🎀

• dev — pointer to the device structure, like the main character struct 🫶
• port — port number to query, the one we're checking on 🔍
• val — pointer to store the result, put the result right here 💾

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🦋 DESCRIPTION 🦋

okay so the tea is: this function reads the SMI registers to determine whether loopback mode is enabled for a specific port. that's the whole vibe, fr fr ✨

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🌸 RETURN 🌸

0 on success, and an error code on failure. when it's 0, slay 💅; when it's an error code, 😭 but at least you know.

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💖 SEE ALSO 💖

The kernel file is ./drivers/net/dsa/microchip/ksz8.c, and the whole squad is:

• ksz8_ind_write8(9)
• ksz8_ind_read8(9)
• ksz879x_set_loopback(9)
• ksz8_r_phy_ctrl(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)

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source/version: ./drivers/net/dsa/microchip · date: October 2026 — mwah, bestie 💋🫶