tpm_cr50_i2c_tis_status(9)

✨ tpm_cr50_i2c_tis_status ✨

okay bestie so we're deep in the kernel API manual rn — this one's a (9) page, which means it's a kernel-internal function situation, not your cute little shell command. and yes, we're looking at tpm_cr50_i2c_tis_status 💅

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🌸 NAME 🌸

tpm_cr50_i2c_tis_status — read the cr50 tis status. that's it, that's the whole job 🫶

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🦋 SYNOPSIS 🦋

u8 tpm_cr50_i2c_tis_status (struct tpm_chip *chip );

literally just hand it a chip and it hands you back a u8. iconic. ⭐

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🎀 ARGUMENTS 🎀

• chip — a TPM chip. that's the whole vibe. one chip, that's what we're working with. 🔥

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💖 DESCRIPTION 💖

so here's the tea: cr50 requires all 4 bytes of the status register to be read. not 1, not 2, not 3 — all four. the way that cr50 fr fr refuses to cooperate otherwise 😭 so this function exists to make sure that read happens correctly, and like… that's the entire bit. no cap. 👑

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🌈 RETURN 🌈

it returns the TPM status byte. one byte. precious. 💜

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🌟 SEE ALSO 🌟

kernel file ./drivers/char/tpm/tpm_tis_i2c_cr50.c struct tpm_i2c_cr50_priv_data(9), and like… the whole friend group honestly:

• tpm_cr50_i2c_int_handler(9)
• tpm_cr50_i2c_wait_tpm_ready(9)
• tpm_cr50_i2c_enable_tpm_irq(9)
• tpm_cr50_i2c_disable_tpm_irq(9)
• tpm_cr50_i2c_transfer_message(9)
• tpm_cr50_i2c_read(9)
• tpm_cr50_i2c_write(9)
• tpm_cr50_check_locality(9)
• tpm_cr50_release_locality(9)
• tpm_cr50_request_locality(9)
• tpm_cr50_i2c_tis_set_ready(9)
• tpm_cr50_i2c_get_burst_and_status(9)
• tpm_cr50_i2c_tis_recv(9)
• tpm_cr50_i2c_tis_send(9)
• tpm_cr50_i2c_req_canceled(9)
• tpm_cr50_vid_to_name(9)
• tpm_cr50_i2c_probe(9)
• tpm_cr50_i2c_remove(9)

go read them. iykyk 🧚

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quick reminder that the source lives at ./drivers/char/tpm — that's the neighborhood this whole friend group grew up in 🍓

and that's a wrap bestie!! 💖 this page is dated October 2026 and it comes from ./drivers/char/tpm, so if you're reading it a while from now, hi from the past, hope the kernel's still slaying 🙈✨