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.. _device-tree/tpm:
Trusted Platform Module (TPM)
=============================
The tpm node describes a TPM device present in the platform. It also includes
event log information.
Required properties
-------------------
All these properties are consumed by skiboot and the linux kernel (tpm and
vtpm codes)
::
compatible : should have "nuvoton,npct650"
linux,sml-base: 64-bit base address of the reserved memory allocated for firmware event log.
sml stands for shared memory log.
linux,sml-size: size of the memory allocated for firmware event log.
Optional properties
-------------------
::
status: indicates whether the device is enabled or disabled. "okay" for
enabled and "disabled" for disabled.
Example
-------
.. code-block:: dts
tpm@57 {
reg = <0x57>;
compatible = "nuvoton,npct650", "nuvoton,npct601";
linux,sml-base = <0x7f 0xfd450000>;
linux,sml-size = <0x10000>;
status = "okay";
phandle = <0x10000017>;
linux,phandle = <0x10000017>;
};
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