1*4882a593Smuzhiyun* H1 Secure Microcontroller with Cr50 Firmware on SPI Bus. 2*4882a593Smuzhiyun 3*4882a593SmuzhiyunH1 Secure Microcontroller running Cr50 firmware provides several 4*4882a593Smuzhiyunfunctions, including TPM-like functionality. It communicates over 5*4882a593SmuzhiyunSPI using the FIFO protocol described in the PTP Spec, section 6. 6*4882a593Smuzhiyun 7*4882a593SmuzhiyunRequired properties: 8*4882a593Smuzhiyun- compatible: Should be "google,cr50". 9*4882a593Smuzhiyun- spi-max-frequency: Maximum SPI frequency. 10*4882a593Smuzhiyun 11*4882a593SmuzhiyunExample: 12*4882a593Smuzhiyun 13*4882a593Smuzhiyun&spi0 { 14*4882a593Smuzhiyun tpm@0 { 15*4882a593Smuzhiyun compatible = "google,cr50"; 16*4882a593Smuzhiyun reg = <0>; 17*4882a593Smuzhiyun spi-max-frequency = <800000>; 18*4882a593Smuzhiyun }; 19*4882a593Smuzhiyun}; 20