On Fri, Sep 28, 2018 at 06:47:16PM +0800, SZ Lin wrote: > The UC-2100 series consists many boards with different peripheral > devices and wireless modules, hence we fetch common items and > create a common dtsi file to increase reusability. All boards in > UC-2100 series will include this common dtsi file. [...] > --- /dev/null > +++ b/arch/arm/boot/dts/am335x-moxa-uc-2100-common.dtsi [...] > + tpm_spi_tis@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". > + reg = <0>; > + spi-max-frequency = <500000>; > + };