On Wed, Sep 28, 2016 at 04:30:41AM -0400, Nayna Jain wrote:
> Newly added support of TPM 2.0 eventlog securityfs pseudo files in tpm
> device driver consumes device tree bindings representing I2C based
> Physical TPM. This patch adds the documentation for corresponding device
> tree bindings of I2C based Physical TPM. These bindings are similar to
> vtpm device tree bindings being used on IBM Power7+ and Power8 Systems
> running PowerVM.
>
> Suggested-by: Jason Gunthorpe <jgunthorpe@xxxxxxxxxxxxxxxxxxxx>
> Signed-off-by: Nayna Jain <nayna@xxxxxxxxxxxxxxxxxx>
> ---
> Changelog v2:
>
> - Include review feedbacks.
> - Move the doc within bindings/security/tpm.
> - Add example for compatible property in description.
> - Delete implicit properties like status, label from description.
> - Redefine linux,sml-base description.
>
> .../devicetree/bindings/security/tpm/tpm-i2c.txt | 20 ++++++++++++++++++++
> 1 file changed, 20 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/security/tpm/tpm-i2c.txt
>
> diff --git a/Documentation/devicetree/bindings/security/tpm/tpm-i2c.txt b/Documentation/devicetree/bindings/security/tpm/tpm-i2c.txt
> new file mode 100644
> index 0000000..16df8bb
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/security/tpm/tpm-i2c.txt
> @@ -0,0 +1,20 @@
> +* Device Tree Bindings for I2C based Trusted Platform Module(TPM)
> +
> +Required properties:
> +
> +- compatible : 'manufacturer,model', eg. nuvoton,npct650
> +- 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 (for OpenPower Systems with Nuvoton TPM 2.0 on I2C)
> +----------------------------------------------------------
> +
> +tpm@57 {
> + reg = <0x57>;
> + label = "tpm";
Not documented, but why? label is really only useful when you have
multiple items that humans need to identify like ports on ethernet
switch or LEDs.
> + compatible = "nuvoton,npct650", "nuvoton,npct601";
> + linux,sml-base = <0x7f 0xfd450000>;
> + linux,sml-size = <0x10000>;
> + status = "okay";
> +};
> --
> 2.5.0
>
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