Virtual TPM, which is being used on IBM POWER7+ and POWER8 systems running
POWERVM, is currently supported by tpm device driver but lacks the
documentation. This patch adds the missing documentation for the existing
support.
Suggested-by: Jason Gunthorpe <jgunthorpe@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Nayna Jain <nayna@xxxxxxxxxxxxxxxxxx>
---
Changelog v2:
- New Patch
.../devicetree/bindings/security/tpm/ibmvtpm.txt | 41 ++++++++++++++++++++++
1 file changed, 41 insertions(+)
create mode 100644 Documentation/devicetree/bindings/security/tpm/ibmvtpm.txt
diff --git a/Documentation/devicetree/bindings/security/tpm/ibmvtpm.txt b/Documentation/devicetree/bindings/security/tpm/ibmvtpm.txt
new file mode 100644
index 0000000..d89f999
--- /dev/null
+++ b/Documentation/devicetree/bindings/security/tpm/ibmvtpm.txt
@@ -0,0 +1,41 @@
+* Device Tree Bindings for IBM Virtual Trusted Platform Module(vtpm)
+
+Required properties:
+
+- compatible : property name that conveys the platform architecture
+ identifiers, as 'IBM,vtpm'
+- device_type : specifies type of virtual device
+- interrupts : property specifying the interrupt source number and
+ sense code associated with this virtual I/O Adapters
+- ibm,my-drc-index : integer index for the connector between the device
+ and its parent - present only if Dynamic
+ Reconfiguration(DR) Connector is enabled
+- ibm,#dma-address-cells: specifies the number of cells that are used to
+ encode the physical address field of dma-window
+ properties
+- ibm,#dma-size-cells : specifies the number of cells that are used to
+ encode the size field of dma-window properties
+- ibm,my-dma-window : specifies DMA window associated with this virtual
+ IOA
+- ibm,loc-code : specifies the unique and persistent location code
+ associated with this virtual I/O Adapters
+- linux,sml-base : 64-bit base address of the reserved memory allocated
+ for the firmware event log
+- linux,sml-size : size of the memory allocated for the firmware event log
+
+Example (IBM Virtual Trusted Platform Module)
+---------------------------------------------
+
+ vtpm@30000003 {
+ ibm,#dma-size-cells = <0x2>;
+ compatible = "IBM,vtpm";
+ device_type = "IBM,vtpm";
+ ibm,my-drc-index = <0x30000003>;
+ ibm,#dma-address-cells = <0x2>;
+ linux,sml-base = <0xc60e 0x0>;
+ interrupts = <0xa0003 0x0>;
+ ibm,my-dma-window = <0x10000003 0x0 0x0 0x0 0x10000000>;
+ ibm,loc-code = "U8286.41A.10082DV-V3-C3";
+ reg = <0x30000003>;
+ linux,sml-size = <0xbce10200>;
+ };
--
2.5.0
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