__spi_register_driver(9)

🌸 NAME 🌸

okay so bestie, welcome to __spi_register_driver(9) from the Kernel API Manual — this is the function that registers a SPI driver. literally its whole job. iconic behavior 💅✨

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🎀 SYNOPSIS 🎀

signature drop, no cap:

int __spi_register_driver (struct module *owner , struct spi_driver
       *sdrv );

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💖 ARGUMENTS 💖

• owner — the owner module of the driver to register. like, whose module is this? gotta claim your driver, bestie 🫶
• sdrv — the driver to register. the main character of this whole operation 👑

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😴 CONTEXT 😴

this one can sleep. yes fr fr, blocking is allowed here — no panic, bestie 💤

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⭐ RETURN ⭐

returns zero on success 🎉 otherwise you get a negative error code 😭 so check it, okay?

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🦋 SEE ALSO 🦋

the kernel file is ./drivers/spi/spi.c — that's where this lives. and here's the whole friend group, all invited to the group chat 💬:

• spi_alloc_device(9), spi_add_device(9), spi_new_device(9), spi_unregister_device(9), spi_register_board_info(9)
• spi_res_alloc(9), spi_res_free(9), spi_res_add(9), spi_res_release(9), spi_finalize_current_transfer(9), __spi_pump_messages(9)
• spi_pump_messages(9), spi_take_timestamp_pre(9), spi_take_timestamp_post(9), spi_set_thread_rt(9), spi_get_next_queued_message(9), spi_finalize_current_message(9)
• spi_queued_transfer(9), spi_flush_queue(9), of_register_spi_devices(9), spi_new_ancillary_device(9), devm_spi_new_ancillary_device(9), acpi_spi_count_resources(9)
• acpi_spi_device_alloc(9), spi_target_abort(9), __spi_alloc_controller(9), __devm_spi_alloc_controller(9), spi_get_gpio_descs(9)
• spi_register_controller(9), devm_spi_register_controller(9), spi_unregister_controller(9), spi_replace_transfers(9), spi_split_transfers_maxsize(9), spi_split_transfers_maxwords(9)
• spi_set_cs_timing(9), spi_setup(9), spi_optimize_message(9), spi_unoptimize_message(9), devm_spi_optimize_message(9), spi_async(9)
• spi_sync(9), spi_sync_locked(9), spi_bus_lock(9), spi_bus_unlock(9), spi_write_then_read(9)

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source/version: ./drivers/spi · date: October 2026 · page: __spi_register_driver(9) — mwah, bye bestie 🫶💖🌸