tpm_is_tpm2(9)

💖 tpm_is_tpm2(9) — Kernel API Manual 💖

okay so bestie, gather round, because we're about to find out the ONE thing everyone wants to know: do we have a TPM2 chip? that's it. that's the whole function. she's a vibe check for your silicon. ✨

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🌸 NAME 🌸

tpm_is_tpm2 — do we have a TPM2 chip? (yes, this is genuinely the entire personality)

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🦋 SYNOPSIS 🦋

int tpm_is_tpm2 (struct tpm_chip *chip );

literally one function, one argument, no notes. 💅

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🎀 ARGUMENTS 🎀

• chip — a struct tpm_chip instance. pass NULL if you want the default chip, because sometimes you just can't be bothered to pick one and honestly? valid. 🫶

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⭐ RETURN ⭐

the receipts, bestie:

• 1 — we DO have a TPM2 chip. slay. 👑
• 0 — we do NOT have a TPM2 chip. it's giving legacy. 💀
• a negative number for system errors (errno) — so if it's negative, something went wrong and you should go read your errno, no cap. 😭

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🔥 SEE ALSO 🔥

the whole friend group, fr fr:

• Kernel file ./drivers/char/tpm/tpm-interface.c
• tpm_calc_ordinal_duration(9)
• tpm_transmit(9)
• tpm_transmit_cmd(9)
• tpm_pcr_read(9)
• tpm_pcr_extend(9)
• tpm_get_random(9)

all icons, all in the same directory, iykyk. 🌈

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lowkey important: 1 means yes, 0 means no, and negative means ✨something broke✨ — don't mix those up or it's gonna be a whole thing. 🙈

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and that's the page! 🎀 this lil gem lives under ./drivers/char/tpm, and the version/date situation is October 2026 — so yeah, she's timestamped and official, tpm_is_tpm2(9) and all. periodt. 💜🧚