On Wed, Sep 28, 2016 at 04:30:40AM -0400, Nayna Jain wrote:
> 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 <jguntho...@obsidianresearch.com>
> Signed-off-by: Nayna Jain <na...@linux.vnet.ibm.com>
> ---
> 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'
You use IBM here, but...
> +- 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
use ibm here. These should be the same unless there's some history I'm
not aware of.
> + 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
Are these "standard" IBM properties? Does dma-ranges not work for you?
> +- 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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