scmi_protocol_release(9)

💅 scmi_protocol_release — the Kernel API Manual page, bestie edition

okay so we're in the Kernel API Manual today and the star of the show is scmi_protocol_release, aka the protocol de-initialization helper 🎀 like literally it's the cleanup bestie, the one who turns off the lights.

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✨ NAME ✨

scmi_protocol_release — protocol de-initialization helper 🫶 the little goodbye function.

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🌸 SYNOPSIS 🌸

void scmi_protocol_release (const struct scmi_handle *handle , u8 protocol_id );

that's it, that's the whole thing. two args and vibes ✨

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🦋 ARGUMENTS 🦋

• handle — a reference to the SCMI platform instance 💜 like, which platform are we talking about, babe.
• protocol_id — the protocol being requested 🌈 the specific one, no guessing.

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👑 DESCRIPTION 👑

so what it does is: remove one user for the specified protocol, and then it triggers de-initialization and resources de-allocation once the last user has gone 🔥

read that again, because it's giving "last one out turns off the lights" 💡 one user dips → the count goes down → and only when the very last user is gone does the whole thing actually de-init and free its resources. no premature cleanup, no cap. periodt 💅

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💀 SEE ALSO 💀

okay this list is LONG, buckle up bestie, iykyk 😭

kernel file ./drivers/firmware/arm_scmi/driver.c — plus all of these:

• struct scmi_xfers_info(9)
• struct scmi_protocol_instance(9)
• struct scmi_info(9)
• scmi_create_protocol_devices(9)
• scmi_xfer_token_set(9)
• scmi_xfer_token_clear(9)
• scmi_xfer_inflight_register_unlocked(9)
• scmi_xfer_inflight_register(9)
• scmi_xfer_raw_inflight_register(9)
• scmi_xfer_pending_set(9)
• scmi_xfer_get(9)
• scmi_xfer_raw_get(9)
• scmi_xfer_raw_channel_get(9)
• __scmi_xfer_put(9)
• scmi_xfer_raw_put(9)
• scmi_xfer_lookup_unlocked(9)
• scmi_bad_message_trace(9)
• scmi_msg_response_validate(9)
• scmi_xfer_state_update(9)
• scmi_xfer_command_acquire(9)
• scmi_rx_callback(9)
• xfer_put(9)
• scmi_wait_for_message_response(9)
• scmi_xfer_raw_wait_for_message_response(9)
• do_xfer(9)
• do_xfer_with_response(9)
• xfer_get_init(9)
• version_get(9)
• scmi_set_protocol_priv(9)
• scmi_get_protocol_priv(9)
• scmi_common_extended_name_get(9)
• scmi_common_get_max_msg_size(9)
• scmi_protocol_msg_check(9)
• struct scmi_iterator(9)
• scmi_revision_area_get(9)
• scmi_protocol_version_negotiate(9)
• scmi_protocol_version_initialize(9)
• scmi_alloc_init_protocol_instance(9)
• scmi_get_protocol_instance(9)
• scmi_protocol_acquire(9)
• scmi_devm_protocol_get(9)
• scmi_devm_protocol_acquire(9)
• scmi_devm_protocol_put(9)
• scmi_is_transport_atomic(9)
• scmi_handle_get(9)
• scmi_handle_put(9)
• scmi_channels_setup(9)

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and that's the page, bestie 🧚 go forth and release protocols responsibly 💖

~ brought to you by ./drivers/firmware/arm_scmi, October 2026 ~ ⭐🎀