serial8250_em485_stop_tx(9)

💅 serial8250_em485_stop_tx(9) 💅

okay so bestie, welcome to the Kernel API Manual — yes, the actual kernel API manual, we're in the big leagues now 🎀 this one's a little function page and honestly? she's giving "quietly essential" energy. let's get into it.

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✨ NAME ✨

serial8250_em485_stop_tx — the generic ->rs485_stop_tx() callback 🦋

like, THE generic one. the blueprint. the main character of stop-tx callbacks. periodt.

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🌸 SYNOPSIS 🌸

void serial8250_em485_stop_tx (struct uart_8250_port *p , bool
toggle_ier );

that's it, that's the whole vibe. returns void — nothing comes back, she just does the thing and leaves 💅

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🫶 ARGUMENTS 🫶

• p — a uart 8250 port 💖 that's your struct uart_8250_port *, the port you're working on, the whole reason we're here
• toggle_ier — a bool, and it's true to allow enabling receive interrupts ✨ so like, if you want rx interrupts to be a thing, you pass true. if not... you don't. iykyk

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👑 DESCRIPTION 👑

Generic callback usable by 8250 uart drivers to stop rs485 transmission 🌈

that's the whole description and honestly it ate. it's the callback the 8250 drivers reach for when they need to stop rs485 transmission — generic, reusable, dependable. not me being obsessed with a driver callback 😭 but here we are.

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🔥 SEE ALSO 🔥

• Kernel file ./drivers/tty/serial/8250/8250_port.c — yeah, literally go read it, it's right there 📂
• serial8250_em485_init(9)
• serial8250_em485_destroy(9)
• serial8250_em485_config(9)
• serial8250_em485_start_tx(9)

the whole em485 friend group fr fr — init, destroy, config, start_tx, and our girl stop_tx. they come as a set, collect them all 🎀

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ngl bestie, this one's short but she's load-bearing. no cap. 🫶

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and that's the page!! 💜 brought to you straight from ./drivers/tty/serial/8250, dated October 2026 — mwah, slay, go stop some rs485 transmission ✨💅🌸