The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)

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FreeBSD/Linux Kernel Cross Reference
sys/contrib/device-tree/Bindings/security/tpm/google,cr50.txt

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

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