mdio_write(9)

💅 mdio_write(9) 💅

okay bestie, welcome to the Kernel API Manual — this is mdio_write(9), and we're reading it like a group chat. no cap, every argument and reference is staying right here. 💖

🎀 NAME 🎀

mdio_write — write MII PHY register. literally the whole name, and she ate. ✨

🦋 SYNOPSIS 🦋

void mdio_write (struct net_device *net_dev , int phy_id , int location , int value );

🌸 ARGUMENTS 🌸

• net_dev — the net device to write. that's the main character you're handing over. 👑
• phy_id — the phy address to write. yes, the PHY's little address badge. 🎀
• location — the phy register id to write. this is the exact spot in register world. 📍
• value — the register value to write with. the actual payload, the vibe being sent. 💌

🔥 DESCRIPTION 🔥

okay so here's the tea: this writes MII registers with value through MDIO and MDC, using the MDIO management frame structure and protocol(defined by ISO/IEC). for the full spec lore, please see SiS7014 or ICS spec. iykyk. 😌

🌈 SEE ALSO 🌈

the whole sis900 cinematic universe lives in the kernel file ./drivers/net/ethernet/sis/sis900.c. go say hi to the whole cast, bestie: 🫶

• sis900_get_mac_addr(9)
• sis630e_get_mac_addr(9)
• sis635_get_mac_addr(9)
• sis96x_get_mac_addr(9)
• sis900_probe(9)
• sis900_mii_probe(9)
• sis900_default_phy(9)
• sis900_set_capability(9)
• read_eeprom(9)
• mdio_read(9)
• sis900_reset_phy(9)
• sis900_open(9)
• sis900_init_rxfilter(9)
• sis900_init_tx_ring(9)
• sis900_init_rx_ring(9)
• sis630_set_eq(9)
• sis900_timer(9)
• sis900_check_mode(9)
• sis900_set_mode(9)
• sis900_auto_negotiate(9)
• sis900_read_mode(9)
• sis900_tx_timeout(9)
• sis900_start_xmit(9)
• sis900_interrupt(9)
• sis900_rx(9)
• sis900_finish_xmit(9)
• sis900_close(9)
• sis900_get_drvinfo(9)
• sis900_set_wol(9)
• mii_ioctl(9)
• sis900_set_config(9)
• sis900_mcast_bitnr(9)
• set_rx_mode(9)
• sis900_reset(9)
• sis900_remove(9)

mwah 💋 — this page is sourced from ./drivers/net/ethernet/sis, dated October 2026, and it's mdio_write(9) signing off. go write some MII PHY registers responsibly, bestie. ✨🫶