xref: /freebsd/sys/contrib/device-tree/Bindings/security/tpm/google,cr50.txt (revision e1c4c8dd8d2d10b6104f06856a77bd5b4813a801) 
1* H1 Secure Microcontroller with Cr50 Firmware on SPI Bus.
2
3H1 Secure Microcontroller running Cr50 firmware provides several
4functions, including TPM-like functionality. It communicates over
5SPI using the FIFO protocol described in the PTP Spec, section 6.
6
7Required properties:
8- compatible: Should be "google,cr50".
9- spi-max-frequency: Maximum SPI frequency.
10
11Example:
12
13&spi0 {
14	tpm@0 {
15		compatible = "google,cr50";
16		reg = <0>;
17		spi-max-frequency = <800000>;
18	};
19};
20