exar_mpio_config_output(9)

💅 exar_mpio_config_output — like, the KERNEL API MANUAL one, bestie

okay so real talk, this is page exar_mpio_config_output(9) from the Kernel API Manual, and it's honestly kind of a vibe. she's short, she's sweet, she turns an Exar MPIO into an output. slay.

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✨ NAME ✨

exar_mpio_config_output — configure an Exar MPIO as an output 🎀

🌸 SYNOPSIS 🌸

int exar_mpio_config_output (struct exar8250 *priv , unsigned int
mpio_num );

like yes, that's the whole signature, no cap 🫶

🦋 ARGUMENTS 🦋

• priv — the device's private structure, aka where all the juicy private info lives 💜
• mpio_num — the MPIO number/offset you're configuring. pick your fave. it's giving "which one, bestie" ✨

👑 DESCRIPTION 👑

so what she does is: configure a single MPIO as an output and disable tristate. that's the whole job. iconic behavior honestly 💅

⚠️ real talk though — it is recommended that you set the level with exar_mpio_set_high/exar_mpio_set_low prior to calling this function, so you can ensure the default MPIO pin state. don't skip this step bestie, it's lowkey important 😭

🔥 RETURN 🔥

• 0 on success 🎉
• a negative error code on failure 💀

periodt.

🌈 SEE ALSO 🌈

• the kernel file ./drivers/tty/serial/8250/8250_exar.c — go read her, she's the main character 📖
• struct exar8250_board(9)
• _exar_mpio_set(9)
• cti_tristate_disable(9)
• cti_plx_int_enable(9)
• cti_read_osc_freq(9)
• cti_get_port_type_xr17c15x_xr17v25x(9)
• cti_get_port_type_fpga(9)
• cti_get_port_type_xr17v35x(9)

iykyk 🧚

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okay that's the whole page, you ate that 🍓 this lil masterpiece lives in ./drivers/tty/serial/8250 and it's dated October 2026 — yes, October 2026, she's from the future and she's thriving ⭐ mwah 💖