ksz_drive_strength_write(9)

💅 ksz_drive_strength_write(9) — like, the whole Kernel API Manual moment

okay so bestie, welcome to the group chat for ksz_drive_strength_write — it lives in the Kernel API Manual and it's lowkey one of those functions that just does its job and does it slayingly. Let's get into it 🎀

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✨ NAME ✨

ksz_drive_strength_write — sets the drive strength for specific KSZ9477 chips and the KSZ87xx chip variants. no cap, that's literally the whole thing 💅

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🦋 SYNOPSIS 🦋

int ksz_drive_strength_write (struct ksz_device *dev , struct
ksz_driver_strength_prop *props , int num_props );

(it's giving "three arguments, one job, zero drama" ✨)

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💖 ARGUMENTS 💖

• dev — the ksz device. your main character struct 🫶
• props — array of drive strength properties to be applied. it's the whole lineup, bestie 🌸
• num_props — how many properties are actually chillin' in that array 🔢

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🔥 DESCRIPTION 🔥

So what does it do? It configures the drive strength for various KSZ9477 chip variants based on the properties you hand it. That's the vibe check ✅

It also handles all the chip-specific nuances — because every chip variant has its own little personality, iykyk — and it makes sure that only valid drive strengths get written to the respective chip. no invalid values sneaking in on its watch, periodt 💀✨

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👑 RETURN 👑

• 0 — successful configuration, we ate 🍓
• a negative error code — failure, and it will let you know 😭

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🌈 SEE ALSO 🌈

Kernel file ./drivers/net/dsa/microchip/ksz_common.c — that's where the magic lives, go say hi 🧚

and the whole friend group of related functions:

• ksz_phylink_mac_disable_tx_lpi(9)
• ksz_phylink_mac_enable_tx_lpi(9)
• ksz_update_port_member(9)
• ksz_parent_mdio_read(9)
• ksz_parent_mdio_write(9)
• ksz_phy_addr_to_port(9)
• ksz_irq_phy_setup(9)
• ksz_irq_phy_free(9)
• ksz_parse_dt_phy_config(9)
• ksz_mdio_register(9)
• ksz_handle_wake_reason(9)
• ksz_is_port_mac_global_usable(9)
• ksz_get_wol(9)
• ksz_set_wol(9)
• ksz_wol_pre_shutdown(9)
• ksz_switch_macaddr_get(9)
• ksz_switch_shutdown(9)
• ksz_drive_strength_to_reg(9)
• ksz_drive_strength_error(9)

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okay that's the whole page, bestie, you're officially educated 💜

cute sign-off time: this iconic little doc comes from ./drivers/net/dsa/microchip, dated October 2026, and it's the ksz_drive_strength_write(9) page — go forth and configure responsibly 🎀✨🦋