acpi_spi_count_resources(9)

💅 acpi_spi_count_resources(9) — from the Kernel API Manual, bestie

okay so picture this: you're deep in ACPI land and you just need a headcount of your SpiSerialBus resources. that's literally the whole function. she counts. she returns. she leaves. iconic behaviour honestly ✨

---

🌸 NAME 🌸

acpi_spi_count_resources — counts the number of SpiSerialBus resources 🧮✨

---

🎀 SYNOPSIS 🎀

int acpi_spi_count_resources (struct acpi_device *adev );

that's it. one (1) argument, one (1) job. no cap. 💅

---

🦋 ARGUMENTS 🦋

• adev — an ACPI device. that's your main character right there 👑 she's the one whose resource-list is getting counted.

---

⭐ RETURN ⭐

so what do you get back? the number of SpiSerialBus resources in the ACPI-device's resource-list — that's your cute little count 🍓

or… a negative error code 🙈 (yeah, the "it's giving error" situation 😭). check it, bestie, fr fr.

---

👑 SEE ALSO 👑

the whole spi.c friend group came to the party, and they all showed up in the Kernel file ./drivers/spi/spi.c 🙌:

__spi_register_driver(9), 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_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)

like… that's the entire group chat, nobody got left on read 💖 also hi to ./drivers/spi — that's the directory repping all of this 🫶

---

and that's the page!! mwah 💋 this came out of ./drivers/spi, dated October 2026, under the acpi_spi_count_resources(9) name — slay, periodt, go count some resources bestie 🌈⭐