_exar_mpio_set(9)

✨ NAME ✨

okay so bestie, welcome to the Kernel API Manual entry for _exar_mpio_set — and it does exactly what the name says: Set an Exar MPIO output high or low. 💅✨

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💅 SYNOPSIS 💅

int _exar_mpio_set (struct exar8250 *priv , unsigned int mpio_num , bool
       high );

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🎀 ARGUMENTS 🎀

• priv — Device's private structure. It's the device's own little private-structure home base.
• mpio_num — MPIO number/offset to set. Slay, specific pin energy.
• high — Set MPIO high if true, low if false. The whole vibe check right there.

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🔥 DESCRIPTION 🔥

Set a single MPIO high or low. Lowkey simple, highkey important. 🫶

You also need to call exar_mpio_config_output to configure the pin as an output — the page literally says exar_mpio_config_output must also be called, so don't skip it, bestie. No cap.

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⭐ RETURN ⭐

0 on success, negative error code on failure. That's the whole return situation. 💖

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🦋 SEE ALSO 🦋

• Kernel file ./drivers/tty/serial/8250/8250_exar.c
• struct exar8250_board(9)
• exar_mpio_config_output(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)

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cute sign-off bestie: this page's source/version is ./drivers/tty/serial/8250, and it's dated October 2026 — mwah, go set those MPIOs 💖✨🌈