xref: /freebsd/sys/contrib/device-tree/Bindings/security/tpm/tpm-i2c.txt (revision ec0ea6efa1ad229d75c394c1a9b9cac33af2b1d3)
1* Device Tree Bindings for I2C based Trusted Platform Module(TPM)
2
3Required properties:
4
5- compatible     : 'manufacturer,model', eg. nuvoton,npct650
6- label          : human readable string describing the device, eg. "tpm"
7- linux,sml-base : 64-bit base address of the reserved memory allocated for
8                   the firmware event log
9- linux,sml-size : size of the memory allocated for the firmware event log
10
11Optional properties:
12
13- powered-while-suspended: present when the TPM is left powered on between
14                           suspend and resume (makes the suspend/resume
15                           callbacks do nothing).
16
17Example (for OpenPower Systems with Nuvoton TPM 2.0 on I2C)
18----------------------------------------------------------
19
20tpm@57 {
21	reg = <0x57>;
22	label = "tpm";
23	compatible = "nuvoton,npct650", "nuvoton,npct601";
24	linux,sml-base = <0x7f 0xfd450000>;
25	linux,sml-size = <0x10000>;
26};
27