From 6ef40b5999aad01379daf19689d264f9e3d518d7 Mon Sep 17 00:00:00 2001 From: Claudio Carvalho Date: Wed, 28 Sep 2016 05:01:02 -0300 Subject: doc/device-tree: add tpm.rst This adds a documentation for the tpm device tree node. Signed-off-by: Claudio Carvalho Signed-off-by: Stewart Smith --- doc/device-tree/tpm.rst | 45 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 45 insertions(+) create mode 100644 doc/device-tree/tpm.rst (limited to 'doc') 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>; + }; + -- cgit v1.1