xref: /openbmc/linux/Documentation/devicetree/bindings/security/tpm/tpm_tis_spi.txt (revision 4f727ecefefbd180de10e25b3e74c03dce3f1e75) 
1Required 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
8Optional SoC Specific Properties:
9- pinctrl-names: Contains only one value - "default".
10- pintctrl-0: Specifies the pin control groups used for this controller.
11
12Example (for ARM-based BeagleBoard xM with TPM_TIS on SPI4):
13
14&mcspi4 {
15
16
17        tpm_tis@0 {
18
19                compatible = "tcg,tpm_tis-spi";
20
21                spi-max-frequency = <10000000>;
22        };
23};
24