Documentation/devicetree/bindings/security/tpm/cr50_spi.txt

* H1 Secure Microcontroller with Cr50 Firmware on SPI Bus.

H1 Secure Microcontroller running Cr50 firmware provides several
functions, including TPM-like functionality. It communicates over
SPI using the FIFO protocol described in the PTP Spec, section 6.

Required properties:
- compatible: Should be "google,cr50".
- spi-max-frequency: Maximum SPI frequency.

Example:

&spi0 {
        status = "okay";

        cr50@0 {
                compatible = "google,cr50";
                reg = <0>;
                spi-max-frequency = <800000>;
        };
};