acpm_get_by_node(9)

✨ acpm_get_by_node(9) ✨

okay so bestie, welcome to the Kernel API Manual, section 9 — yes we're in the big-kid kernel-functions section, put some respect on it 💅 this page is literally all about acpm_get_by_node, and it's giving "small function, big job" energy fr fr.

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🌸 NAME 🌸

acpm_get_by_node — get the ACPM handle using node pointer. that's it, that's the whole vibe: you hand it a node pointer, it hands you a handle 🫶

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🦋 SYNOPSIS 🦋

struct acpm_handle * acpm_get_by_node (struct device *dev , struct device_node *np );

look at that signature, iconic, no notes 👑

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🎀 ARGUMENTS 🎀

• dev — device pointer requesting the ACPM handle. it's the one doing the asking, main character energy honestly 💖
• np — the ACPM device tree node. the node in question, the one we're keying off of 🌸

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⭐ RETURN ⭐

pointer to the handle on success 🎉 and ERR_PTR(-errno) otherwise 😭 — so yeah, do the IS_ERR() check, bestie, don't just raw-dog the pointer, i'm begging 🙈

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💀 NOTE 💀

the handle CANNOT be pointer to const. like, cannot. not "shouldn't", not "maybe don't" — CANNOT. so don't go slapping const on it and acting surprised when things go sideways, ngl that's on you 💅

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🔥 SEE ALSO 🔥

kernel file ./drivers/firmware/samsung/exynos-acpm.c — that's the source of truth, go read it, iykyk 📖 and then the whole friend group:

• struct acpm_shmem(9)
• struct acpm_chan_shmem(9)
• struct acpm_queue(9)
• struct acpm_rx_data(9)
• struct acpm_chan(9)
• struct acpm_info(9)
• struct acpm_match_data(9)
• acpm_get_saved_rx(9)
• acpm_get_rx(9)
• acpm_dequeue_by_polling(9)
• acpm_wait_for_queue_slots(9)
• acpm_prepare_xfer(9)
• acpm_wait_for_message_response(9)
• acpm_do_xfer(9)
• acpm_set_xfer(9)
• acpm_chan_shmem_get_params(9)
• acpm_achan_alloc_cmds(9)
• acpm_free_mbox_chans(9)
• acpm_channels_init(9)
• acpm_handle_put(9)
• devm_acpm_release(9)
• devm_acpm_get_by_node(9)
• devm_acpm_get_by_phandle(9)

that's the whole squad, all (9), all slaying in their own way 🌈

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okay that's the page!! 🍓 this lil beauty lives in ./drivers/firmware/samsung, stamped October 2026, and it's brought to you by the acpm_get_by_node(9) page of the Kernel API Manual — mwah, go get that handle bestie, and remember: check for ERR_PTR 💜✨🧚