[PATCH] Documentation: tpm: Adds the TPM device tree node documentation

[Nayna Jain <nayna-23VcF4HTsmIX0ybBhKVfKdBPR1lH4CV8@public.gmane.org>]

This is documenting device tree binding for
I2C based TPM, similar concept which being used
for virtual TPM on POWER7 and POWER8 systems running PowerVM.

Signed-off-by: Nayna Jain <nayna-23VcF4HTsmIX0ybBhKVfKdBPR1lH4CV8@public.gmane.org>
---
 Documentation/devicetree/bindings/i2c/i2c-tpm.txt | 29 +++++++++++++++++++++++
 1 file changed, 29 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/i2c/i2c-tpm.txt

diff --git a/Documentation/devicetree/bindings/i2c/i2c-tpm.txt b/Documentation/devicetree/bindings/i2c/i2c-tpm.txt
new file mode 100644
index 0000000..8fdee14
--- /dev/null
+++ b/Documentation/devicetree/bindings/i2c/i2c-tpm.txt
@@ -0,0 +1,29 @@
+Device Tree Bindings for I2C based Trusted Platform Module(TPM)
+---------------------------------------------------------------
+
+This node describes a TPM device connected to Processor on i2c bus.
+
+Required properties:
+
+- compatible : 'manufacturer,model'
+- label : represents device type
+- linux,sml-base : base address of the Event Log. It is a physical address.
+		   sml stands for shared memory log.
+- linux,sml-size : size of the memory allocated for the 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>;
+	label = "tpm";
+	compatible = "nuvoton,npct650", "nuvoton,npct601";
+	linux,sml-base = <0x7f 0xfd450000>;
+	linux,sml-size = <0x10000>;
+	status = "okay";
+};
-- 
2.5.0

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