hsi_setup(9)

✨ hsi_setup(9) ✨

okay so this is a page from the Kernel API Manual, and bestie, it's a short one but it's literally the whole vibe of getting an HSI client's port configured. let's get into it 🎀

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🌸 NAME 🌸

hsi_setup — configure the client's port 💅

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🦋 SYNOPSIS 🦋

int hsi_setup (struct hsi_client *cl );

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💖 ARGUMENTS 💖

• cl — pointer to the HSI client 🫶 like, that's the thing you're setting up, no cap.

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🌈 DESCRIPTION 🌈

okay so here's the tea ☕ — when ports are being shared, clients should either relay on a single client setup, or have the same setup for all of them. that's it, that's the rule. no solo setups when you're sharing, periodt 💀

and the return value? iconic and simple:

• returns -errno on failure 😭
• returns 0 on success ✨

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👑 SEE ALSO 👑

the kernel file ./include/linux/hsi/hsi.h, plus a whole friend group of structs and functions you should absolutely go say hi to:

• struct hsi_channel(9)
• struct hsi_config(9)
• struct hsi_board_info(9)
• struct hsi_client(9)
• struct hsi_client_driver(9)
• struct hsi_msg(9)
• struct hsi_port(9)
• struct hsi_controller(9)
• hsi_id(9)
• hsi_port_id(9)
• hsi_flush(9)
• hsi_async_read(9)
• hsi_async_write(9)
• hsi_start_tx(9)
• hsi_stop_tx(9)

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and that's the whole page bestie, short and sweet 🍓 mwah 💋

this came from ./include/linux/hsi and it's dated October 2026 — so yeah, mark your calendar, the source is literally right there, iykyk 🌟