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author | Claudio Carvalho <cclaudio@linux.vnet.ibm.com> | 2016-09-28 05:01:02 -0300 |
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committer | Stewart Smith <stewart@linux.vnet.ibm.com> | 2016-10-05 14:42:26 +1100 |
commit | 6ef40b5999aad01379daf19689d264f9e3d518d7 (patch) | |
tree | eb78e0de0a37178a0239f76259fdd5ce911bd965 /doc | |
parent | f28379a1df27d8a4677d8181421af80bda3205e6 (diff) | |
download | skiboot-6ef40b5999aad01379daf19689d264f9e3d518d7.zip skiboot-6ef40b5999aad01379daf19689d264f9e3d518d7.tar.gz skiboot-6ef40b5999aad01379daf19689d264f9e3d518d7.tar.bz2 |
doc/device-tree: add tpm.rst
This adds a documentation for the tpm device tree node.
Signed-off-by: Claudio Carvalho <cclaudio@linux.vnet.ibm.com>
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
Diffstat (limited to 'doc')
-rw-r--r-- | doc/device-tree/tpm.rst | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/doc/device-tree/tpm.rst b/doc/device-tree/tpm.rst new file mode 100644 index 0000000..e4106a4 --- /dev/null +++ b/doc/device-tree/tpm.rst @@ -0,0 +1,45 @@ +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 added by hostboot and consumed by skiboot and the +linux kernel (tpm and vtpm codes) + +:: + + compatible : manufacturer,model + + 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 firwmare event log. + + +Optional properties +------------------- + +:: + + status: indicates whether the device is enabled or disabled. "okay" for + enabled and "disabled" for disabled. + +Example +------- + +:: + + 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>; + }; + |