1fb8d6c8dSAndrey Pronin* H1 Secure Microcontroller with Cr50 Firmware on SPI Bus. 2fb8d6c8dSAndrey Pronin 3fb8d6c8dSAndrey ProninH1 Secure Microcontroller running Cr50 firmware provides several 4fb8d6c8dSAndrey Proninfunctions, including TPM-like functionality. It communicates over 5fb8d6c8dSAndrey ProninSPI using the FIFO protocol described in the PTP Spec, section 6. 6fb8d6c8dSAndrey Pronin 7fb8d6c8dSAndrey ProninRequired properties: 8fb8d6c8dSAndrey Pronin- compatible: Should be "google,cr50". 9fb8d6c8dSAndrey Pronin- spi-max-frequency: Maximum SPI frequency. 10fb8d6c8dSAndrey Pronin 11fb8d6c8dSAndrey ProninExample: 12fb8d6c8dSAndrey Pronin 13fb8d6c8dSAndrey Pronin&spi0 { 14fb8d6c8dSAndrey Pronin tpm@0 { 15fb8d6c8dSAndrey Pronin compatible = "google,cr50"; 16fb8d6c8dSAndrey Pronin reg = <0>; 17fb8d6c8dSAndrey Pronin spi-max-frequency = <800000>; 18fb8d6c8dSAndrey Pronin }; 19fb8d6c8dSAndrey Pronin}; 20