summaryrefslogtreecommitdiffstats
path: root/Documentation/devicetree/bindings/security/tpm/tpm_tis_mmio.txt
diff options
context:
space:
mode:
Diffstat (limited to 'Documentation/devicetree/bindings/security/tpm/tpm_tis_mmio.txt')
-rw-r--r--Documentation/devicetree/bindings/security/tpm/tpm_tis_mmio.txt25
1 files changed, 25 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/security/tpm/tpm_tis_mmio.txt b/Documentation/devicetree/bindings/security/tpm/tpm_tis_mmio.txt
new file mode 100644
index 000000000..7c6304426
--- /dev/null
+++ b/Documentation/devicetree/bindings/security/tpm/tpm_tis_mmio.txt
@@ -0,0 +1,25 @@
+Trusted Computing Group MMIO Trusted Platform Module
+
+The TCG defines multi vendor standard for accessing a TPM chip, this
+is the standard protocol defined to access the TPM via MMIO. Typically
+this interface will be implemented over Intel's LPC bus.
+
+Refer to the 'TCG PC Client Specific TPM Interface Specification (TIS)' TCG
+publication for the specification.
+
+Required properties:
+
+- compatible: should contain a string below for the chip, followed by
+ "tcg,tpm-tis-mmio". Valid chip strings are:
+ * "atmel,at97sc3204"
+- reg: The location of the MMIO registers, should be at least 0x5000 bytes
+- interrupts: An optional interrupt indicating command completion.
+
+Example:
+
+ tpm_tis@90000 {
+ compatible = "atmel,at97sc3204", "tcg,tpm-tis-mmio";
+ reg = <0x90000 0x5000>;
+ interrupt-parent = <&EIC0>;
+ interrupts = <1 2>;
+ };