scm_legacy_call_atomic(9)

🦋 NAME 🦋

okay so bestie, welcome to the scm_legacy_call_atomic(9) page from the Kernel API Manual — and it's literally here to Send an atomic SCM command with up to 5 arguments and 3 return values. periodt. 💅

✨ SYNOPSIS ✨

int scm_legacy_call_atomic (struct device *unused , const struct
qcom_scm_desc *desc , struct qcom_scm_res *res );

🎀 ARGUMENTS 🎀

• unused — it's a device, but it's the legacy argument, so it's not used, and it can be NULL. no cap, just leave it be 🙈
• desc — the SCM call descriptor containing arguments. 📝
• res — the SCM call return values. 💖

💅 DESCRIPTION 💅

This shall only be used with commands that are guaranteed to be uninterruptable, atomic and SMP safe. like, do not freestyle with this one — it's strictly for that exact vibe, okay? 🔥

👑 SEE ALSO 👑

• Kernel file ./drivers/firmware/qcom/qcom_scm-legacy.c
• struct arm_smccc_args(9)
• struct scm_legacy_command(9)
• struct scm_legacy_response(9)
• scm_legacy_command_to_response(9)
• scm_legacy_get_command_buffer(9)
• scm_legacy_get_response_buffer(9)
• scm_legacy_call(9)

that's the whole page, bestie 🫶 — source/version is ./drivers/firmware/qcom, dated October 2026. slay and stay atomic 💖✨