xref: /OK3568_Linux_fs/kernel/Documentation/devicetree/bindings/security/tpm/google,cr50.txt (revision 4882a59341e53eb6f0b4789bf948001014eff981)
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