[Skiboot] [PATCH] i2c: Add nuvoton quirk, disallowing i2cdetect as it locks TPM

Stewart Smith stewart at linux.vnet.ibm.com
Fri Dec 2 14:56:29 AEDT 2016

Stewart Smith <stewart at linux.vnet.ibm.com> writes:
> In TPM 2.0 Firmware and (at least) there exists
> a bug where if you send the wrong thing to the TPM it may lock the
> bus, with no way of recovery except powering the TPM off/on.
> On our current systems, the only way to power the TPM off/on is to pull
> the power on the system (*NOT* just power off/on to host from BMC).
> So, this patch adds the ability to do things to the i2c request really
> early on, well before it hits any hardware, such as quickly drop it.
> Signed-off-by: Stewart Smith <stewart at linux.vnet.ibm.com>
> ---
Merged to master as of 157468aeb16e9f50551ac9bc7d46887cba0e011f
and 5.4.x as of ce40329032145dd03bfebb14dee79f79dbc6fd52

Stewart Smith
OPAL Architect, IBM.

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