Documentation/devicetree/bindings/security/tpm/tpm_tis_spi.txt

   1 Required properties:
   2 - compatible: should be one of the following
   3     "st,st33htpm-spi"
   4     "infineon,slb9670"
   5     "tcg,tpm_tis-spi"
   6 - spi-max-frequency: Maximum SPI frequency (depends on TPMs).
   7
   8 Optional SoC Specific Properties:
   9 - pinctrl-names: Contains only one value - "default".
  10 - pintctrl-0: Specifies the pin control groups used for this controller.
  11
  12 Example (for ARM-based BeagleBoard xM with TPM_TIS on SPI4):
  13
  14 &mcspi4 {
  15
  16         status = "okay";
  17
  18         tpm_tis@0 {
  19
  20                 compatible = "tcg,tpm_tis-spi";
  21
  22                 spi-max-frequency = <10000000>;
  23         };
  24 };