On Mon, Aug 24, 2020 at 02:19:48PM -0700, rentao.bupt@xxxxxxxxx wrote: > Add initial version of device tree for Facebook Wedge400 (AST2500) BMC. [...] > --- /dev/null > +++ b/arch/arm/boot/dts/aspeed-bmc-facebook-wedge400.dts [...] > + 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>; > + };