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". > + spi-max-frequency = <33000000>; > + reg = <0>; > + }; > + };