devm_mux_state_get_from_np(9)

💅 devm_mux_state_get_from_np(9) — like, the managed way to grab a mux-state, bestie

okay so real talk — this is a page from the Kernel API Manual, and it's about one very specific lil function that gets you a mux-state for a device with resource management baked in. no manual cleanup era. we love to see it. 🎀

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✨ SYNOPSIS ✨

struct mux_state * devm_mux_state_get_from_np (struct device *dev ,
const char *mux_name , struct device_node *np );

that's the whole signature, no cap. she takes three args and hands you back a struct mux_state *. 💖

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🌸 ARGUMENTS 🌸

• dev — the device that needs a mux-control. like, this is the main character of the call, the one who's gonna use the mux. 👑
• mux_name — the name identifying the mux-control. this is how you tell it which mux you're on about, iykyk. 🦋
• np — the device nodes. and listen: if it's NULL, it just uses dev->of_node instead. convenient fr fr. ✨

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🔥 RETURN 🔥

you get back a pointer to the mux-state — or an ERR_PTR with a negative errno if things went sideways. 😭 so yeah, always check that thing before you go dereferencing, bestie.

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💜 DESCRIPTION 💜

the mux-state will automatically be freed on release. that's the whole devm magic, and honestly? it's giving "I don't have time to call free myself" energy. slay. 🫶

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🌈 SEE ALSO 🌈

okay this list is long, so buckle up. she was thorough. 💀

• the kernel file ./drivers/mux/core.c — that's the source, go read it, it's iconic
• 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_control_select_delay(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_optional(9)
• devm_mux_state_get_selected(9)
• devm_mux_state_get_optional_selected(9)

like I said. thorough. main character energy from the whole mux subsystem honestly. 💅

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⭐ tiny vibe check: devm_mux_state_get_from_np gives you the resource-managed version, so the freeing happens for you on release — don't go freeing it yourself, that's not the move. 🧚

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and that's the page! 🌸 this one lives under ./drivers/mux, it's from the Kernel API Manual, and it was dated October 2026. go forth and mux responsibly, bestie — mwah 💖💅✨