---
Patrick Williams
> On Dec 20, 2023, at 2:07 AM, Lukas Wunner <lukas@xxxxxxxxx> wrote:
>
> On Tue, Dec 07, 2021 at 05:49:24PM +0800, Howard Chiu wrote:
>> Initial introduction of Facebook Bletchley equipped with
>> Aspeed 2600 BMC SoC.
> [...]
>> + tpmdev@0 {
>> + compatible = "tcg,tpm_tis-spi";
>
> What's the chip used on this board? Going forward, the DT schema for TPMs
> requires the exact chip name in addition to the generic "tcg,tpm_tis-spi".
Why is this a requirement? This assumes there is exactly one chip. TPMs are often placed on a pluggable module in which multiple vendors could be used. There is no way in the DTS to specify multiple compatible chips.
>> + spi-max-frequency = <33000000>;
>> + reg = <0>;
>> + };
>> + };
