mux_control_select_delay(9)

💖 mux_control_select_delay(9) 💖

Hey bestie, welcome to the Kernel API Manual page for mux_control_select_delay(9) — this is the one that asks your mux-control to switch to a given state and then chills for a tiny delay if the state actually changes. Slay. ✨

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🌸 NAME 🌸

mux_control_select_delay — Select the given multiplexer state.

🦋 SYNOPSIS 🦋

int mux_control_select_delay (struct mux_control *mux , unsigned int
state , unsigned int delay_us );

🎀 ARGUMENTS 🎀

• mux — The mux-control to request a change of state from. Like, this is the main character you're talking to. 👑
• state — The new requested state. The vibe you want it to switch to.
• delay_us — The time to delay (in microseconds) if the mux state is changed. Tiny little pause, measured in microseconds. ⏳

💅 DESCRIPTION 💅

On successfully selecting the mux-control state, it will be locked until there is a call to mux_control_deselect. So yeah, once you successfully select it, it's locked up until somebody calls mux_control_deselect. No cap.

If the mux-control is already selected when mux_control_select is called, the caller will be blocked until mux_control_deselect or mux_state_deselect is called (by someone else). Yep, you gotta wait for someone else to free it — literally blocked until one of those deselect calls happens. 😭

Therefore, make sure to call mux_control_deselect when the operation is complete and the mux-control is free for others to use, but do not call mux_control_deselect if mux_control_select fails. This is important, bestie: clean up with mux_control_deselect when you're done and the mux-control is free for others, but do not call mux_control_deselect if mux_control_select fails. Periodt. 💀

⭐ RETURN ⭐

0 when the mux-control state has the requested state or a negative errno on error.

💜 SEE ALSO 💜

• Kernel file ./drivers/mux/core.c
• struct mux_state(9)
• struct devm_mux_state_state(9)
• mux_chip_alloc(9)
• mux_chip_register(9)
• mux_chip_unregister(9)
• mux_chip_free(9)
• devm_mux_chip_alloc(9)
• devm_mux_chip_register(9)
• mux_control_states(9)
• mux_state_select_delay(9)
• mux_control_try_select_delay(9)
• mux_state_try_select_delay(9)
• mux_control_deselect(9)
• mux_state_deselect(9)
• mux_get(9)
• mux_control_get(9)
• mux_control_get_optional(9)
• mux_control_put(9)
• devm_mux_control_get(9)
• mux_state_get(9)
• __devm_mux_state_get(9)
• devm_mux_state_get_from_np(9)
• devm_mux_state_get_optional(9)
• devm_mux_state_get_selected(9)
• devm_mux_state_get_optional_selected(9)

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mwah 💋 — this page is from the ./drivers/mux source/version, dated October 2026. byeeee 🫶✨