tpm_crb_ffa...face_version(9)

💅 tpm_crb_ffa_get_interface_version — bestie's guide

okay so welcome to the Kernel API Manual, girlies and gentlethems ✨ — today we're looking at tpm_crb_ffa_get_interface_version(9) and honestly? she's a little legend. sit down, grab a boba, let's get into it 🧋

---

🌸 NAME 🌸

tpm_crb_ffa_get_interface_version — literally just gets the ABI version of the TPM service. that's it. that's the whole vibe check 🎀

---

✨ SYNOPSIS ✨

int tpm_crb_ffa_get_interface_version (u16 *major , u16 *minor );

like, she takes two pointers and hands you back an int. no cap, that's the whole signature 💖

---

🫶 ARGUMENTS 🫶

• major — a pointer to a caller-allocated buffer that's gonna hold the major version number of the ABI. you allocate it, she fills it. team effort, iykyk 💅
• minor — same situation, but for the minor version number of the ABI. pointer to your caller-allocated buffer, she writes the minor version in there 🦋

---

🌈 DESCRIPTION 🌈

so what she actually does is return the major and minor version of the ABI of the FF-A based TPM. and like — why do you care? because it allows the caller to evaluate its compatibility with the version of the ABI 👑 basically she's the friend who checks whether your outfit matches the dress code before you walk in. iconic behaviour fr fr 🌸

---

⭐ RETURN ⭐

• 0 on success — slay, we love a clean zero 💖
• a negative error code on failure — 😭 that's it, that's the whole failure situation

---

🦋 SEE ALSO 🦋

• the kernel file ./drivers/char/tpm/tpm_crb_ffa.c — go read your roots, bestie 📖
• tpm_crb_ffa_init(9)
• tpm_crb_ffa_start(9)

💀 quick reminder: this page is filed under ./drivers/char/tpm, so if you're lost, that's the neighbourhood 🏡

---

and that's a wrap, bestie 🎀✨ this lil masterpiece lives in ./drivers/char/tpm and the date on it is October 2026 — so mark your calendar, screenshot it, frame it, whatever 😌💜 bye pookie 🫶